621405116 has 6 divisors (see below), whose sum is σ = 1087458960. Its totient is φ = 310702556.

The previous prime is 621405049. The next prime is 621405133. The reversal of 621405116 is 611504126.

621405116 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×621405116² = 772288636381946912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77675636 + ... + 77675643.

It is an arithmetic number, because the mean of its divisors is an integer number (181243160).

Almost surely, 2^621405116 is an apocalyptic number.

It is an amenable number.

621405116 is a deficient number, since it is larger than the sum of its proper divisors (466053844).

621405116 is a wasteful number, since it uses less digits than its factorization.

621405116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155351283 (or 155351281 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 621405116 is about 24927.9986360718. The cubic root of 621405116 is about 853.3455763353.

The spelling of 621405116 in words is "six hundred twenty-one million, four hundred five thousand, one hundred sixteen".