55123553111 has 8 divisors (see below), whose sum is σ = 60136746384. Its totient is φ = 50110686720.

The previous prime is 55123553087. The next prime is 55123553131. The reversal of 55123553111 is 11135532155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55123553111 - 2¹⁸ = 55123290967 is a prime.

It is a super-2 number, since 2×55123553111² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55123553131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388601 + ... + 511133.

It is an arithmetic number, because the mean of its divisors is an integer number (7517093298).

Almost surely, 2^55123553111 is an apocalyptic number.

55123553111 is a deficient number, since it is larger than the sum of its proper divisors (5013193273).

55123553111 is a wasteful number, since it uses less digits than its factorization.

55123553111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163441.

The product of its digits is 11250, while the sum is 32.

The spelling of 55123553111 in words is "fifty-five billion, one hundred twenty-three million, five hundred fifty-three thousand, one hundred eleven".