645612313465 has 64 divisors (see below), whose sum is σ = 934708916736. Its totient is φ = 418868416512.

The previous prime is 645612313459. The next prime is 645612313469. The reversal of 645612313465 is 564313216546.

It is not a de Polignac number, because 645612313465 - 2⁷ = 645612313337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645612313469) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7714134 + ... + 7797376.

It is an arithmetic number, because the mean of its divisors is an integer number (14604826824).

Almost surely, 2^645612313465 is an apocalyptic number.

It is an amenable number.

645612313465 is a deficient number, since it is larger than the sum of its proper divisors (289096603271).

645612313465 is a wasteful number, since it uses less digits than its factorization.

645612313465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83458.

The product of its digits is 1555200, while the sum is 46.

The spelling of 645612313465 in words is "six hundred forty-five billion, six hundred twelve million, three hundred thirteen thousand, four hundred sixty-five".