40656725531 has 4 divisors (see below), whose sum is σ = 40787454864. Its totient is φ = 40525996200.

The previous prime is 40656725497. The next prime is 40656725563. The reversal of 40656725531 is 13552765604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40656725531 - 2¹⁸ = 40656463387 is a prime.

It is a super-2 number, since 2×40656725531² (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 (40656725591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65364200 + ... + 65364821.

It is an arithmetic number, because the mean of its divisors is an integer number (10196863716).

Almost surely, 2^40656725531 is an apocalyptic number.

40656725531 is a deficient number, since it is larger than the sum of its proper divisors (130729333).

40656725531 is a wasteful number, since it uses less digits than its factorization.

40656725531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130729332.

The product of its (nonzero) digits is 756000, while the sum is 44.

The spelling of 40656725531 in words is "forty billion, six hundred fifty-six million, seven hundred twenty-five thousand, five hundred thirty-one".