56038687581 has 8 divisors (see below), whose sum is σ = 74861665344. Its totient is φ = 37287417440.

The previous prime is 56038687577. The next prime is 56038687589. The reversal of 56038687581 is 18578683065.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56038687581 - 2² = 56038687577 is a prime.

It is a super-2 number, since 2×56038687581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56038687589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17925081 + ... + 17928206.

It is an arithmetic number, because the mean of its divisors is an integer number (9357708168).

Almost surely, 2^56038687581 is an apocalyptic number.

It is an amenable number.

56038687581 is a deficient number, since it is larger than the sum of its proper divisors (18822977763).

56038687581 is a wasteful number, since it uses less digits than its factorization.

56038687581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35853811.

The product of its (nonzero) digits is 9676800, while the sum is 57.

The spelling of 56038687581 in words is "fifty-six billion, thirty-eight million, six hundred eighty-seven thousand, five hundred eighty-one".