55197955979155 has 32 divisors (see below), whose sum is σ = 72604589760000. Its totient is φ = 39952068441600.

The previous prime is 55197955979137. The next prime is 55197955979161.

55197955979155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55197955979155 - 2⁷ = 55197955979027 is a prime.

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, 329950971 + ... + 330118219.

It is an arithmetic number, because the mean of its divisors is an integer number (2268893430000).

Almost surely, 2^{55197955979155} is an apocalyptic number.

55197955979155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55197955979155 is a deficient number, since it is larger than the sum of its proper divisors (17406633780845).

55197955979155 is a wasteful number, since it uses less digits than its factorization.

55197955979155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195915.

The product of its digits is 5023265625, while the sum is 82.

The spelling of 55197955979155 in words is "fifty-five trillion, one hundred ninety-seven billion, nine hundred fifty-five million, nine hundred seventy-nine thousand, one hundred fifty-five".