621621116 has 24 divisors (see below), whose sum is σ = 1153005840. Its totient is φ = 292228352.

The previous prime is 621621079. The next prime is 621621137. The reversal of 621621116 is 611126126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71291 + ... + 79533.

It is an arithmetic number, because the mean of its divisors is an integer number (48041910).

Almost surely, 2^621621116 is an apocalyptic number.

It is an amenable number.

621621116 is a deficient number, since it is larger than the sum of its proper divisors (531384724).

621621116 is a wasteful number, since it uses less digits than its factorization.

621621116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9373 (or 9371 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 621621116 is about 24932.3307374180. The cubic root of 621621116 is about 853.4444389973. Note that the first 4 decimals are identical.

The spelling of 621621116 in words is "six hundred twenty-one million, six hundred twenty-one thousand, one hundred sixteen".