56503113691 has 18 divisors (see below), whose sum is σ = 62201583780. Its totient is φ = 51180311160.

The previous prime is 56503113677. The next prime is 56503113731. The reversal of 56503113691 is 19631130565.

It is not a de Polignac number, because 56503113691 - 2⁵ = 56503113659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56503113631) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23829736 + ... + 23832106.

Almost surely, 2^56503113691 is an apocalyptic number.

56503113691 is a deficient number, since it is larger than the sum of its proper divisors (5698470089).

56503113691 is an frugal number, since it uses more digits than its factorization.

56503113691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4807 (or 2413 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 40.

The spelling of 56503113691 in words is "fifty-six billion, five hundred three million, one hundred thirteen thousand, six hundred ninety-one".