651611056020 has 96 divisors (see below), whose sum is σ = 1830620324736. Its totient is φ = 173181580800.

The previous prime is 651611056013. The next prime is 651611056093. The reversal of 651611056020 is 20650116156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54563250 + ... + 54575190.

It is an arithmetic number, because the mean of its divisors is an integer number (19068961716).

Almost surely, 2^651611056020 is an apocalyptic number.

651611056020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

651611056020 is an abundant number, since it is smaller than the sum of its proper divisors (1179009268716).

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

651611056020 is a wasteful number, since it uses less digits than its factorization.

651611056020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14921 (or 14919 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 651611056020 in words is "six hundred fifty-one billion, six hundred eleven million, fifty-six thousand, twenty".