56253116681 has 4 divisors (see below), whose sum is σ = 57449991552. Its totient is φ = 55056241812.

The previous prime is 56253116639. The next prime is 56253116723. The reversal of 56253116681 is 18661135265.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (56253116639) and next prime (56253116723).

It is a cyclic number.

It is not a de Polignac number, because 56253116681 - 2¹⁴ = 56253100297 is a prime.

It is a super-2 number, since 2×56253116681² (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 (56253116081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598437365 + ... + 598437458.

It is an arithmetic number, because the mean of its divisors is an integer number (14362497888).

Almost surely, 2^56253116681 is an apocalyptic number.

It is an amenable number.

56253116681 is a deficient number, since it is larger than the sum of its proper divisors (1196874871).

56253116681 is a wasteful number, since it uses less digits than its factorization.

56253116681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196874870.

The product of its digits is 259200, while the sum is 44.

The spelling of 56253116681 in words is "fifty-six billion, two hundred fifty-three million, one hundred sixteen thousand, six hundred eighty-one".