64572253165 has 12 divisors (see below), whose sum is σ = 90137594556. Its totient is φ = 44278116288.

The previous prime is 64572253159. The next prime is 64572253199. The reversal of 64572253165 is 56135227546.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 50282680644 + 14289572521 = 224238^2 + 119539^2 .

It is not a de Polignac number, because 64572253165 - 2²³ = 64563864557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131779864 + ... + 131780353.

It is an arithmetic number, because the mean of its divisors is an integer number (7511466213).

Almost surely, 2^64572253165 is an apocalyptic number.

It is an amenable number.

64572253165 is a deficient number, since it is larger than the sum of its proper divisors (25565341391).

64572253165 is a wasteful number, since it uses less digits than its factorization.

64572253165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263560236 (or 263560229 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 46.

The spelling of 64572253165 in words is "sixty-four billion, five hundred seventy-two million, two hundred fifty-three thousand, one hundred sixty-five".