55197479155 has 32 divisors (see below), whose sum is σ = 82438473600. Its totient is φ = 34545595392.

The previous prime is 55197479153. The next prime is 55197479159.

55197479155 is nontrivially palindromic in base 10.

55197479155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55197479155 - 2¹ = 55197479153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55197479155.

It is not an unprimeable number, because it can be changed into a prime (55197479153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 641040 + ... + 722029.

It is an arithmetic number, because the mean of its divisors is an integer number (2576202300).

Almost surely, 2^55197479155 is an apocalyptic number.

55197479155 is a deficient number, since it is larger than the sum of its proper divisors (27240994445).

55197479155 is a wasteful number, since it uses less digits than its factorization.

55197479155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363183.

The product of its digits is 9922500, while the sum is 58.

The spelling of 55197479155 in words is "fifty-five billion, one hundred ninety-seven million, four hundred seventy-nine thousand, one hundred fifty-five".