55780825560 has 64 divisors (see below), whose sum is σ = 171865260000. Its totient is φ = 14472861696.

The previous prime is 55780825553. The next prime is 55780825567. The reversal of 55780825560 is 6552808755.

It is an interprime number because it is at equal distance from previous prime (55780825553) and next prime (55780825567).

It is a super-2 number, since 2×55780825560² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55780825567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6277185 + ... + 6286064.

Almost surely, 2^55780825560 is an apocalyptic number.

It is an amenable number.

55780825560 is an abundant number, since it is smaller than the sum of its proper divisors (116084434440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55780825560 is a wasteful number, since it uses less digits than its factorization.

55780825560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12563300 (or 12563296 counting only the distinct ones).

The product of its (nonzero) digits is 3360000, while the sum is 51.

The spelling of 55780825560 in words is "fifty-five billion, seven hundred eighty million, eight hundred twenty-five thousand, five hundred sixty".