641402048 has 56 divisors (see below), whose sum is σ = 1504797600. Its totient is φ = 265402368.

The previous prime is 641402029. The next prime is 641402063. The reversal of 641402048 is 840204146.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×641402048² = 822793174357188608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 641402048.

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 7 ways as a sum of consecutive naturals, for example, 11693 + ... + 37676.

Almost surely, 2^641402048 is an apocalyptic number.

It is an amenable number.

641402048 is an abundant number, since it is smaller than the sum of its proper divisors (863395552).

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

641402048 is a wasteful number, since it uses less digits than its factorization.

641402048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49417 (or 49407 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 641402048 is about 25325.9165283312. The cubic root of 641402048 is about 862.4027130484.

The spelling of 641402048 in words is "six hundred forty-one million, four hundred two thousand, forty-eight".