55916581965 has 32 divisors (see below), whose sum is σ = 90746572800. Its totient is φ = 29396727360.

The previous prime is 55916581957. The next prime is 55916581991. The reversal of 55916581965 is 56918561955.

It is not a de Polignac number, because 55916581965 - 2³ = 55916581957 is a prime.

It is a super-2 number, since 2×55916581965² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55916581899 and 55916581908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 695400 + ... + 771630.

It is an arithmetic number, because the mean of its divisors is an integer number (2835830400).

Almost surely, 2^55916581965 is an apocalyptic number.

It is an amenable number.

55916581965 is a deficient number, since it is larger than the sum of its proper divisors (34829990835).

55916581965 is a wasteful number, since it uses less digits than its factorization.

55916581965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76937.

The product of its digits is 14580000, while the sum is 60.

The spelling of 55916581965 in words is "fifty-five billion, nine hundred sixteen million, five hundred eighty-one thousand, nine hundred sixty-five".