621435164 has 12 divisors (see below), whose sum is σ = 1242870384. Its totient is φ = 266329344.

The previous prime is 621435161. The next prime is 621435167. The reversal of 621435164 is 461534126.

It is an interprime number because it is at equal distance from previous prime (621435161) and next prime (621435167).

621435164 is an admirable number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 621435164.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621435161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11097029 + ... + 11097084.

It is an arithmetic number, because the mean of its divisors is an integer number (103572532).

Almost surely, 2^621435164 is an apocalyptic number.

It is an amenable number.

621435164 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

621435164 is a wasteful number, since it uses less digits than its factorization.

621435164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22194124 (or 22194122 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 621435164 is about 24928.6013245830. The cubic root of 621435164 is about 853.3593306017.

The spelling of 621435164 in words is "six hundred twenty-one million, four hundred thirty-five thousand, one hundred sixty-four".