645041315 has 16 divisors (see below), whose sum is σ = 798668640. Its totient is φ = 499802880.

The previous prime is 645041303. The next prime is 645041329. The reversal of 645041315 is 513140546.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-645041315 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17177 + ... + 39813.

It is an arithmetic number, because the mean of its divisors is an integer number (49916790).

Almost surely, 2^645041315 is an apocalyptic number.

645041315 is a deficient number, since it is larger than the sum of its proper divisors (153627325).

645041315 is a wasteful number, since it uses less digits than its factorization.

645041315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22822.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 645041315 is about 25397.6635736439. The cubic root of 645041315 is about 864.0307072670.

The spelling of 645041315 in words is "six hundred forty-five million, forty-one thousand, three hundred fifteen".