40125649539361 has 3 divisors (see below), whose sum is σ = 40125655873843. Its totient is φ = 40125643204880.

The previous prime is 40125649539341. The next prime is 40125649539373. The reversal of 40125649539361 is 16393594652104.

The square root of 40125649539361 is 6334481.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 40018668212961 + 106981326400 = 6326031^2 + 327080^2 .

It is not a de Polignac number, because 40125649539361 - 2¹¹ = 40125649537313 is a prime.

It is a super-2 number, since 2×40125649539361² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40125649539296 and 40125649539305.

It is not an unprimeable number, because it can be changed into a prime (40125649539341) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3167241 + ... + 9501721.

Almost surely, 2^{40125649539361} is an apocalyptic number.

40125649539361 is the 6334481-st square number.

40125649539361 is the 3167241-st centered octagonal number.

It is an amenable number.

40125649539361 is a deficient number, since it is larger than the sum of its proper divisors (6334482).

40125649539361 is an frugal number, since it uses more digits than its factorization.

40125649539361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12668962 (or 6334481 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 58.

The spelling of 40125649539361 in words is "forty trillion, one hundred twenty-five billion, six hundred forty-nine million, five hundred thirty-nine thousand, three hundred sixty-one".