623138517265 has 16 divisors (see below), whose sum is σ = 819611073216. Its totient is φ = 451043812800.

The previous prime is 623138517247. The next prime is 623138517301. The reversal of 623138517265 is 562715831326.

It is a happy number.

It is not a de Polignac number, because 623138517265 - 2¹¹ = 623138515217 is a prime.

It is a super-2 number, since 2×623138517265² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26836242 + ... + 26859451.

It is an arithmetic number, because the mean of its divisors is an integer number (51225692076).

Almost surely, 2^623138517265 is an apocalyptic number.

It is an amenable number.

623138517265 is a deficient number, since it is larger than the sum of its proper divisors (196472555951).

623138517265 is a wasteful number, since it uses less digits than its factorization.

623138517265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53695920.

The product of its digits is 1814400, while the sum is 49.

The spelling of 623138517265 in words is "six hundred twenty-three billion, one hundred thirty-eight million, five hundred seventeen thousand, two hundred sixty-five".