645641525146546 has 16 divisors (see below), whose sum is σ = 970823640211488. Its totient is φ = 322034286839200.

The previous prime is 645641525146481. The next prime is 645641525146573.

645641525146546 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158427460 + ... + 162451663.

It is an arithmetic number, because the mean of its divisors is an integer number (60676477513218).

Almost surely, 2^{645641525146546} is an apocalyptic number.

645641525146546 is a deficient number, since it is larger than the sum of its proper divisors (325182115064942).

645641525146546 is a wasteful number, since it uses less digits than its factorization.

645641525146546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320881577.

The product of its digits is 414720000, while the sum is 64.

The spelling of 645641525146546 in words is "six hundred forty-five trillion, six hundred forty-one billion, five hundred twenty-five million, one hundred forty-six thousand, five hundred forty-six".