641212064 has 24 divisors (see below), whose sum is σ = 1263376800. Its totient is φ = 320354496.

The previous prime is 641212037. The next prime is 641212081. The reversal of 641212064 is 460212146.

It is a super-2 number, since 2×641212064² = 822305822038280192, which contains 22 as substring.

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, 37607 + ... + 51929.

It is an arithmetic number, because the mean of its divisors is an integer number (52640700).

Almost surely, 2^641212064 is an apocalyptic number.

It is an amenable number.

641212064 is a deficient number, since it is larger than the sum of its proper divisors (622164736).

641212064 is a wasteful number, since it uses less digits than its factorization.

641212064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15732 (or 15724 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 641212064 is about 25322.1654682217. The cubic root of 641212064 is about 862.3175564257.

The spelling of 641212064 in words is "six hundred forty-one million, two hundred twelve thousand, sixty-four".