641413904 has 10 divisors (see below), whose sum is σ = 1242739470. Its totient is φ = 320706944.

The previous prime is 641413891. The next prime is 641413919. The reversal of 641413904 is 409314146.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 568345600 + 73068304 = 23840^2 + 8548^2 .

It is a super-2 number, since 2×641413904² = 822823592489042432, 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 as a sum of consecutive naturals, namely, 20044169 + ... + 20044200.

It is an arithmetic number, because the mean of its divisors is an integer number (124273947).

Almost surely, 2^641413904 is an apocalyptic number.

It is an amenable number.

641413904 is a deficient number, since it is larger than the sum of its proper divisors (601325566).

641413904 is a wasteful number, since it uses less digits than its factorization.

641413904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40088377 (or 40088371 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 641413904 is about 25326.1505957775. The cubic root of 641413904 is about 862.4080267117.

The spelling of 641413904 in words is "six hundred forty-one million, four hundred thirteen thousand, nine hundred four".