55018607121 has 24 divisors (see below), whose sum is σ = 82716142080. Its totient is φ = 35196983136.

The previous prime is 55018607099. The next prime is 55018607123. The reversal of 55018607121 is 12170681055.

55018607121 is a `hidden beast` number, since 5 + 501 + 8 + 60 + 71 + 21 = 666.

55018607121 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 55018607121 - 2⁹ = 55018606609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55018607123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 604081 + ... + 689166.

It is an arithmetic number, because the mean of its divisors is an integer number (3446505920).

Almost surely, 2^55018607121 is an apocalyptic number.

It is an amenable number.

55018607121 is a deficient number, since it is larger than the sum of its proper divisors (27697534959).

55018607121 is a wasteful number, since it uses less digits than its factorization.

55018607121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293445 (or 1293442 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 36.

The spelling of 55018607121 in words is "fifty-five billion, eighteen million, six hundred seven thousand, one hundred twenty-one".