645416541024 has 24 divisors (see below), whose sum is σ = 1694218420440. Its totient is φ = 215138846976.

The previous prime is 645416541019. The next prime is 645416541031. The reversal of 645416541024 is 420145614546.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×645416541024² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3361544389 + ... + 3361544580.

It is an arithmetic number, because the mean of its divisors is an integer number (70592434185).

Almost surely, 2^645416541024 is an apocalyptic number.

It is an amenable number.

645416541024 is an abundant number, since it is smaller than the sum of its proper divisors (1048801879416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645416541024 is a wasteful number, since it uses less digits than its factorization.

645416541024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6723088982 (or 6723088974 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 645416541024 in words is "six hundred forty-five billion, four hundred sixteen million, five hundred forty-one thousand, twenty-four".