55123432155 has 72 divisors (see below), whose sum is σ = 107585019360. Its totient is φ = 26074540800.

The previous prime is 55123432151. The next prime is 55123432163.

55123432155 is a `hidden beast` number, since 5 + 51 + 23 + 432 + 155 = 666.

55123432155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55123432155 - 2² = 55123432151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55123432151) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 99786 + ... + 346704.

It is an arithmetic number, because the mean of its divisors is an integer number (1494236380).

Almost surely, 2^55123432155 is an apocalyptic number.

55123432155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55123432155 is a deficient number, since it is larger than the sum of its proper divisors (52461587205).

55123432155 is a wasteful number, since it uses less digits than its factorization.

55123432155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246993 (or 246979 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The spelling of 55123432155 in words is "fifty-five billion, one hundred twenty-three million, four hundred thirty-two thousand, one hundred fifty-five".