641216004 has 48 divisors (see below), whose sum is σ = 1757743680. Its totient is φ = 179360640.

The previous prime is 641215969. The next prime is 641216041. The reversal of 641216004 is 400612146.

It is a super-2 number, since 2×641216004² = 822315927571456032, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185119 + ... + 188550.

It is an arithmetic number, because the mean of its divisors is an integer number (36619660).

Almost surely, 2^641216004 is an apocalyptic number.

It is an amenable number.

641216004 is an abundant number, since it is smaller than the sum of its proper divisors (1116527676).

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

641216004 is a wasteful number, since it uses less digits than its factorization.

641216004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373700 (or 373698 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 641216004 is about 25322.2432655561. The cubic root of 641216004 is about 862.3193226247.

It can be divided in two parts, 64121 and 6004, that added together give a triangular number (70125 = T₃₇₄).

The spelling of 641216004 in words is "six hundred forty-one million, two hundred sixteen thousand, four".