55981538160 has 80 divisors (see below), whose sum is σ = 181088123904. Its totient is φ = 14279347456.

The previous prime is 55981538153. The next prime is 55981538167. The reversal of 55981538160 is 6183518955.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55981538153) and next prime (55981538167).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×55981538160² (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 (55981538167) 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, 5065272 + ... + 5076311.

Almost surely, 2^55981538160 is an apocalyptic number.

It is an amenable number.

55981538160 is an abundant number, since it is smaller than the sum of its proper divisors (125106585744).

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

55981538160 is a wasteful number, since it uses less digits than its factorization.

55981538160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10141622 (or 10141616 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 51.

The spelling of 55981538160 in words is "fifty-five billion, nine hundred eighty-one million, five hundred thirty-eight thousand, one hundred sixty".