55124918639 has 16 divisors (see below), whose sum is σ = 65928549888. Its totient is φ = 45065293152.

The previous prime is 55124918603. The next prime is 55124918657. The reversal of 55124918639 is 93681942155.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55124918639 is a prime.

It is a super-2 number, since 2×55124918639² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55124918689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437492 + ... + 549225.

It is an arithmetic number, because the mean of its divisors is an integer number (4120534368).

Almost surely, 2^55124918639 is an apocalyptic number.

55124918639 is a deficient number, since it is larger than the sum of its proper divisors (10803631249).

55124918639 is a wasteful number, since it uses less digits than its factorization.

55124918639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987094.

The product of its digits is 2332800, while the sum is 53.

The spelling of 55124918639 in words is "fifty-five billion, one hundred twenty-four million, nine hundred eighteen thousand, six hundred thirty-nine".