64515258125 has 20 divisors (see below), whose sum is σ = 82797168300. Its totient is φ = 50217264000.

The previous prime is 64515258047. The next prime is 64515258139. The reversal of 64515258125 is 52185251546.

It is a happy number.

64515258125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 10 ways, for example, as 52322902564 + 12192355561 = 228742^2 + 110419^2 .

It is not a de Polignac number, because 64515258125 - 2¹⁰ = 64515257101 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1371800 + ... + 1418049.

It is an arithmetic number, because the mean of its divisors is an integer number (4139858415).

Almost surely, 2^64515258125 is an apocalyptic number.

It is an amenable number.

64515258125 is a deficient number, since it is larger than the sum of its proper divisors (18281910175).

64515258125 is an equidigital number, since it uses as much as digits as its factorization.

64515258125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2789906 (or 2789891 counting only the distinct ones).

The product of its digits is 480000, while the sum is 44.

The spelling of 64515258125 in words is "sixty-four billion, five hundred fifteen million, two hundred fifty-eight thousand, one hundred twenty-five".