55111020601172 has 12 divisors (see below), whose sum is σ = 96444365811360. Its totient is φ = 27555487512216.

The previous prime is 55111020601159. The next prime is 55111020601183. The reversal of 55111020601172 is 27110602011155.

It is a congruent number.

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, 491123 + ... + 10510149.

It is an arithmetic number, because the mean of its divisors is an integer number (8037030484280).

Almost surely, 2^{55111020601172} is an apocalyptic number.

It is an amenable number.

55111020601172 is a deficient number, since it is larger than the sum of its proper divisors (41333345210188).

55111020601172 is a wasteful number, since it uses less digits than its factorization.

55111020601172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11394190 (or 11394188 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 32.

The spelling of 55111020601172 in words is "fifty-five trillion, one hundred eleven billion, twenty million, six hundred one thousand, one hundred seventy-two".