55373958639 has 32 divisors (see below), whose sum is σ = 83129894400. Its totient is φ = 36879695928.

The previous prime is 55373958581. The next prime is 55373958659. The reversal of 55373958639 is 93685937355.

55373958639 is a `hidden beast` number, since 5 + 537 + 3 + 95 + 8 + 6 + 3 + 9 = 666.

It is not a de Polignac number, because 55373958639 - 2¹⁶ = 55373893103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55373958659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2312872 + ... + 2336690.

It is an arithmetic number, because the mean of its divisors is an integer number (2597809200).

Almost surely, 2^55373958639 is an apocalyptic number.

55373958639 is a deficient number, since it is larger than the sum of its proper divisors (27755935761).

55373958639 is an equidigital number, since it uses as much as digits as its factorization.

55373958639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24903 (or 24885 counting only the distinct ones).

The product of its digits is 91854000, while the sum is 63.

The spelling of 55373958639 in words is "fifty-five billion, three hundred seventy-three million, nine hundred fifty-eight thousand, six hundred thirty-nine".