64815357903 has 16 divisors (see below), whose sum is σ = 86570469120. Its totient is φ = 43135307136.

The previous prime is 64815357883. The next prime is 64815357953. The reversal of 64815357903 is 30975351846.

It is not a de Polignac number, because 64815357903 - 2¹⁸ = 64815095759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64815357953) 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, 4809751 + ... + 4823207.

It is an arithmetic number, because the mean of its divisors is an integer number (5410654320).

Almost surely, 2^64815357903 is an apocalyptic number.

64815357903 is a deficient number, since it is larger than the sum of its proper divisors (21755111217).

64815357903 is a wasteful number, since it uses less digits than its factorization.

64815357903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16126.

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 64815357903 in words is "sixty-four billion, eight hundred fifteen million, three hundred fifty-seven thousand, nine hundred three".