623999438055 has 48 divisors (see below), whose sum is σ = 1236191471424. Its totient is φ = 285238817280.

The previous prime is 623999437979. The next prime is 623999438089. The reversal of 623999438055 is 550834999326.

623999438055 is a `hidden beast` number, since 62 + 3 + 9 + 99 + 438 + 0 + 55 = 666.

It is not a de Polignac number, because 623999438055 - 2⁸ = 623999437799 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 623999437983 and 623999438001.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 5780637 + ... + 5887593.

It is an arithmetic number, because the mean of its divisors is an integer number (25753988988).

Almost surely, 2^623999438055 is an apocalyptic number.

623999438055 is a deficient number, since it is larger than the sum of its proper divisors (612192033369).

623999438055 is a wasteful number, since it uses less digits than its factorization.

623999438055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125496 (or 125493 counting only the distinct ones).

The product of its (nonzero) digits is 62985600, while the sum is 63.

The spelling of 623999438055 in words is "six hundred twenty-three billion, nine hundred ninety-nine million, four hundred thirty-eight thousand, fifty-five".