501611656616 has 48 divisors (see below), whose sum is σ = 1097942682240. Its totient is φ = 214216742880.

The previous prime is 501611656607. The next prime is 501611656627. The reversal of 501611656616 is 616656116105.

It is a super-2 number, since 2×501611656616² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2149880 + ... + 2371751.

It is an arithmetic number, because the mean of its divisors is an integer number (22873805880).

Almost surely, 2^501611656616 is an apocalyptic number.

501611656616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

501611656616 is an abundant number, since it is smaller than the sum of its proper divisors (596331025624).

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

501611656616 is a wasteful number, since it uses less digits than its factorization.

501611656616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521934 (or 4521923 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 501611656616 in words is "five hundred one billion, six hundred eleven million, six hundred fifty-six thousand, six hundred sixteen".