641252616 has 16 divisors (see below), whose sum is σ = 1603131600. Its totient is φ = 213750864.

The previous prime is 641252569. The next prime is 641252657. The reversal of 641252616 is 616252146.

It is a super-2 number, since 2×641252616² = 822409835053686912, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13359406 + ... + 13359453.

It is an arithmetic number, because the mean of its divisors is an integer number (100195725).

Almost surely, 2^641252616 is an apocalyptic number.

It is an amenable number.

641252616 is an abundant number, since it is smaller than the sum of its proper divisors (961878984).

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

641252616 is a wasteful number, since it uses less digits than its factorization.

641252616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26718868 (or 26718864 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 641252616 is about 25322.9661769707. The cubic root of 641252616 is about 862.3357344807.

The spelling of 641252616 in words is "six hundred forty-one million, two hundred fifty-two thousand, six hundred sixteen".