55123023555 has 40 divisors (see below), whose sum is σ = 98857991232. Its totient is φ = 29385597312.

The previous prime is 55123023547. The next prime is 55123023587. The reversal of 55123023555 is 55532032155.

55123023555 is a `hidden beast` number, since 5 + 51 + 2 + 30 + 23 + 555 = 666.

It is not a de Polignac number, because 55123023555 - 2³ = 55123023547 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 896479 + ... + 955991.

Almost surely, 2^55123023555 is an apocalyptic number.

55123023555 is a deficient number, since it is larger than the sum of its proper divisors (43734967677).

55123023555 is a wasteful number, since it uses less digits than its factorization.

55123023555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61817 (or 61808 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 36.

The spelling of 55123023555 in words is "fifty-five billion, one hundred twenty-three million, twenty-three thousand, five hundred fifty-five".