645416532315 has 48 divisors (see below), whose sum is σ = 1142782857216. Its totient is φ = 336822120000.

The previous prime is 645416532311. The next prime is 645416532367. The reversal of 645416532315 is 513235614546.

It is a happy number.

645416532315 is a `hidden beast` number, since 6 + 4 + 541 + 65 + 32 + 3 + 15 = 666.

It is not a de Polignac number, because 645416532315 - 2² = 645416532311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (645416532311) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10016250 + ... + 10080480.

It is an arithmetic number, because the mean of its divisors is an integer number (23807976192).

Almost surely, 2^645416532315 is an apocalyptic number.

645416532315 is a deficient number, since it is larger than the sum of its proper divisors (497366324901).

645416532315 is a wasteful number, since it uses less digits than its factorization.

645416532315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69040 (or 69037 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The spelling of 645416532315 in words is "six hundred forty-five billion, four hundred sixteen million, five hundred thirty-two thousand, three hundred fifteen".