55131881416 has 16 divisors (see below), whose sum is σ = 109453000140. Its totient is φ = 25944414720.

The previous prime is 55131881401. The next prime is 55131881473. The reversal of 55131881416 is 61418813155.

It can be written as a sum of positive squares in 2 ways, for example, as 53524673316 + 1607208100 = 231354^2 + 40090^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202690605 + ... + 202690876.

Almost surely, 2^55131881416 is an apocalyptic number.

It is an amenable number.

55131881416 is a deficient number, since it is larger than the sum of its proper divisors (54321118724).

55131881416 is a wasteful number, since it uses less digits than its factorization.

55131881416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405381504 (or 405381500 counting only the distinct ones).

The product of its digits is 115200, while the sum is 43.

The spelling of 55131881416 in words is "fifty-five billion, one hundred thirty-one million, eight hundred eighty-one thousand, four hundred sixteen".