645053112515 has 24 divisors (see below), whose sum is σ = 900592463232. Its totient is φ = 442247971200.

The previous prime is 645053112433. The next prime is 645053112547. The reversal of 645053112515 is 515211350546.

It is not a de Polignac number, because 645053112515 - 2¹⁰ = 645053111491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1263815 + ... + 1699215.

It is an arithmetic number, because the mean of its divisors is an integer number (37524685968).

Almost surely, 2^645053112515 is an apocalyptic number.

645053112515 is a deficient number, since it is larger than the sum of its proper divisors (255539350717).

645053112515 is a wasteful number, since it uses less digits than its factorization.

645053112515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441467 (or 441460 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 645053112515 in words is "six hundred forty-five billion, fifty-three million, one hundred twelve thousand, five hundred fifteen".