55129155291268 has 6 divisors (see below), whose sum is σ = 96476021759726. Its totient is φ = 27564577645632.

The previous prime is 55129155291263. The next prime is 55129155291277. The reversal of 55129155291268 is 86219255192155.

It can be written as a sum of positive squares in only one way, i.e., 37204363813444 + 17924791477824 = 6099538^2 + 4233768^2 .

It is not an unprimeable number, because it can be changed into a prime (55129155291263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6891144411405 + ... + 6891144411412.

Almost surely, 2^{55129155291268} is an apocalyptic number.

It is an amenable number.

55129155291268 is a deficient number, since it is larger than the sum of its proper divisors (41346866468458).

55129155291268 is a wasteful number, since it uses less digits than its factorization.

55129155291268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13782288822821 (or 13782288822819 counting only the distinct ones).

The product of its digits is 19440000, while the sum is 61.

The spelling of 55129155291268 in words is "fifty-five trillion, one hundred twenty-nine billion, one hundred fifty-five million, two hundred ninety-one thousand, two hundred sixty-eight".