55806705513 has 80 divisors (see below), whose sum is σ = 94817923200. Its totient is φ = 32426853120.

The previous prime is 55806705503. The next prime is 55806705533. The reversal of 55806705513 is 31550760855.

55806705513 is a `hidden beast` number, since 5 + 580 + 6 + 7 + 0 + 55 + 13 = 666.

It is not a de Polignac number, because 55806705513 - 2⁴ = 55806705497 is a prime.

It is a super-2 number, since 2×55806705513² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55806705503) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 6217693 + ... + 6226661.

It is an arithmetic number, because the mean of its divisors is an integer number (1185224040).

Almost surely, 2^55806705513 is an apocalyptic number.

It is an amenable number.

55806705513 is a deficient number, since it is larger than the sum of its proper divisors (39011217687).

55806705513 is a wasteful number, since it uses less digits than its factorization.

55806705513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9324 (or 9315 counting only the distinct ones).

The product of its (nonzero) digits is 630000, while the sum is 45.

The spelling of 55806705513 in words is "fifty-five billion, eight hundred six million, seven hundred five thousand, five hundred thirteen".