551656616 has 16 divisors (see below), whose sum is σ = 1182121440. Its totient is φ = 236424240.

The previous prime is 551656607. The next prime is 551656639. The reversal of 551656616 is 616656155.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4925450 + ... + 4925561.

It is an arithmetic number, because the mean of its divisors is an integer number (73882590).

Almost surely, 2^551656616 is an apocalyptic number.

551656616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

551656616 is an abundant number, since it is smaller than the sum of its proper divisors (630464824).

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

551656616 is a wasteful number, since it uses less digits than its factorization.

551656616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9851024 (or 9851020 counting only the distinct ones).

The product of its digits is 162000, while the sum is 41.

The square root of 551656616 is about 23487.3714152946. The cubic root of 551656616 is about 820.1430525756.

The spelling of 551656616 in words is "five hundred fifty-one million, six hundred fifty-six thousand, six hundred sixteen".