645452332424 has 16 divisors (see below), whose sum is σ = 1262841520320. Its totient is φ = 308694593680.

The previous prime is 645452332363. The next prime is 645452332433. The reversal of 645452332424 is 424233254546.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1753946372 + ... + 1753946739.

It is an arithmetic number, because the mean of its divisors is an integer number (78927595020).

Almost surely, 2^645452332424 is an apocalyptic number.

It is an amenable number.

645452332424 is a deficient number, since it is larger than the sum of its proper divisors (617389187896).

645452332424 is a wasteful number, since it uses less digits than its factorization.

645452332424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507893140 (or 3507893136 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 44.

The spelling of 645452332424 in words is "six hundred forty-five billion, four hundred fifty-two million, three hundred thirty-two thousand, four hundred twenty-four".