641402016 has 48 divisors (see below), whose sum is σ = 1686773088. Its totient is φ = 213408000.

The previous prime is 641402009. The next prime is 641402023. The reversal of 641402016 is 610204146.

It is an interprime number because it is at equal distance from previous prime (641402009) and next prime (641402023).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×641402016² = 822793092257728512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 48966 + ... + 60666.

It is an arithmetic number, because the mean of its divisors is an integer number (35141106).

Almost surely, 2^641402016 is an apocalyptic number.

It is an amenable number.

641402016 is an abundant number, since it is smaller than the sum of its proper divisors (1045371072).

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

641402016 is a wasteful number, since it uses less digits than its factorization.

641402016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12285 (or 12277 counting only the distinct ones).

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

The square root of 641402016 is about 25325.9158965673. The cubic root of 641402016 is about 862.4026987064.

The spelling of 641402016 in words is "six hundred forty-one million, four hundred two thousand, sixteen".