56538712558 has 4 divisors (see below), whose sum is σ = 84808068840. Its totient is φ = 28269356278.

The previous prime is 56538712501. The next prime is 56538712561. The reversal of 56538712558 is 85521783565.

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

It is a super-2 number, since 2×56538712558² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56538712499 and 56538712508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14134678138 + ... + 14134678141.

It is an arithmetic number, because the mean of its divisors is an integer number (21202017210).

Almost surely, 2^56538712558 is an apocalyptic number.

56538712558 is a deficient number, since it is larger than the sum of its proper divisors (28269356282).

56538712558 is a wasteful number, since it uses less digits than its factorization.

56538712558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28269356281.

The product of its digits is 10080000, while the sum is 55.

The spelling of 56538712558 in words is "fifty-six billion, five hundred thirty-eight million, seven hundred twelve thousand, five hundred fifty-eight".