56787780555 has 48 divisors (see below), whose sum is σ = 107404618464. Its totient is φ = 27527293440.

The previous prime is 56787780527. The next prime is 56787780563. The reversal of 56787780555 is 55508778765.

56787780555 is a `hidden beast` number, since 5 + 6 + 7 + 8 + 7 + 78 + 0 + 555 = 666.

56787780555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56787780555 - 2¹⁴ = 56787764171 is a prime.

It is a super-2 number, since 2×56787780555² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56787780492 and 56787780501.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2829817 + ... + 2849813.

It is an arithmetic number, because the mean of its divisors is an integer number (2237596218).

Almost surely, 2^56787780555 is an apocalyptic number.

56787780555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56787780555 is a deficient number, since it is larger than the sum of its proper divisors (50616837909).

56787780555 is a wasteful number, since it uses less digits than its factorization.

56787780555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25756 (or 25753 counting only the distinct ones).

The product of its (nonzero) digits is 82320000, while the sum is 63.

The spelling of 56787780555 in words is "fifty-six billion, seven hundred eighty-seven million, seven hundred eighty thousand, five hundred fifty-five".