6401621004 has 48 divisors (see below), whose sum is σ = 15593609472. Its totient is φ = 2040172992.

The previous prime is 6401620949. The next prime is 6401621071. The reversal of 6401621004 is 4001261046.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 869322 + ... + 876654.

It is an arithmetic number, because the mean of its divisors is an integer number (324866864).

Almost surely, 2^6401621004 is an apocalyptic number.

It is an amenable number.

6401621004 is an abundant number, since it is smaller than the sum of its proper divisors (9191988468).

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

6401621004 is a wasteful number, since it uses less digits than its factorization.

6401621004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10526 (or 10524 counting only the distinct ones).

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

The square root of 6401621004 is about 80010.1306335641. The cubic root of 6401621004 is about 1856.7922709226.

The spelling of 6401621004 in words is "six billion, four hundred one million, six hundred twenty-one thousand, four".