40063625281 has 3 divisors (see below), whose sum is σ = 40063825441. Its totient is φ = 40063425122.

The previous prime is 40063625249. The next prime is 40063625293. The reversal of 40063625281 is 18252636004.

The square root of 40063625281 is 200159.

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 is not a de Polignac number, because 40063625281 - 2⁵ = 40063625249 is a prime.

It is a super-2 number, since 2×40063625281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40063625281.

It is not an unprimeable number, because it can be changed into a prime (40063625681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 100080 + ... + 300238.

Almost surely, 2^40063625281 is an apocalyptic number.

40063625281 is the 200159-th square number.

40063625281 is the 100080-th centered octagonal number.

It is an amenable number.

40063625281 is a deficient number, since it is larger than the sum of its proper divisors (200160).

40063625281 is an frugal number, since it uses more digits than its factorization.

40063625281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400318 (or 200159 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 40063625281 in words is "forty billion, sixty-three million, six hundred twenty-five thousand, two hundred eighty-one".