40636109056 has 81 divisors (see below), whose sum is σ = 83328105189. Its totient is φ = 19777809408.

The previous prime is 40636109011. The next prime is 40636109057. The reversal of 40636109056 is 65090163604.

The square root of 40636109056 is 201584.

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

It can be written as a sum of positive squares in only one way, i.e., 38447366400 + 2188742656 = 196080^2 + 46784^2 .

It is a super-2 number, since 2×40636109056² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40636109057) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 138689646 + ... + 138689938.

Almost surely, 2^40636109056 is an apocalyptic number.

40636109056 is the 201584-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40636109056

40636109056 is an abundant number, since it is smaller than the sum of its proper divisors (42691996133).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40636109056 is an frugal number, since it uses more digits than its factorization.

40636109056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 40636109056 in words is "forty billion, six hundred thirty-six million, one hundred nine thousand, fifty-six".