645315211264 has 26 divisors (see below), whose sum is σ = 1290472883060. Its totient is φ = 322657603584.

The previous prime is 645315211243. The next prime is 645315211271. The reversal of 645315211264 is 462112513546.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78769734 + ... + 78777925.

Almost surely, 2^645315211264 is an apocalyptic number.

645315211264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

645315211264 is a deficient number, since it is larger than the sum of its proper divisors (645157671796).

645315211264 is an equidigital number, since it uses as much as digits as its factorization.

645315211264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157547683 (or 157547661 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The spelling of 645315211264 in words is "six hundred forty-five billion, three hundred fifteen million, two hundred eleven thousand, two hundred sixty-four".