621616104 has 48 divisors (see below), whose sum is σ = 1684737600. Its totient is φ = 207058464.

The previous prime is 621616087. The next prime is 621616109. The reversal of 621616104 is 401616126.

It is not an unprimeable number, because it can be changed into a prime (621616109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156657 + ... + 160575.

It is an arithmetic number, because the mean of its divisors is an integer number (35098700).

Almost surely, 2^621616104 is an apocalyptic number.

It is an amenable number.

621616104 is an abundant number, since it is smaller than the sum of its proper divisors (1063121496).

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

621616104 is a wasteful number, since it uses less digits than its factorization.

621616104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6134 (or 6127 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 621616104 is about 24932.2302251523. The cubic root of 621616104 is about 853.4421452769.

It can be divided in two parts, 62161 and 6104, that added together give a triangular number (68265 = T₃₆₉).

The spelling of 621616104 in words is "six hundred twenty-one million, six hundred sixteen thousand, one hundred four".