645415602015 has 32 divisors (see below), whose sum is σ = 1035875427840. Its totient is φ = 343152526464.

The previous prime is 645415601993. The next prime is 645415602023. The reversal of 645415602015 is 510206514546.

645415602015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 645415602015 - 2¹⁸ = 645415339871 is a prime.

It is a super-2 number, since 2×645415602015² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10372366 + ... + 10434404.

It is an arithmetic number, because the mean of its divisors is an integer number (32371107120).

Almost surely, 2^645415602015 is an apocalyptic number.

645415602015 is a deficient number, since it is larger than the sum of its proper divisors (390459825825).

645415602015 is a wasteful number, since it uses less digits than its factorization.

645415602015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64191.

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 645415602015 in words is "six hundred forty-five billion, four hundred fifteen million, six hundred two thousand, fifteen".