65556110820 has 48 divisors (see below), whose sum is σ = 184219818048. Its totient is φ = 17418514560.

The previous prime is 65556110819. The next prime is 65556110881. The reversal of 65556110820 is 2801165556.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1955586 + ... + 1988825.

It is an arithmetic number, because the mean of its divisors is an integer number (3837912876).

Almost surely, 2^65556110820 is an apocalyptic number.

65556110820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65556110820 is an abundant number, since it is smaller than the sum of its proper divisors (118663707228).

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

65556110820 is a wasteful number, since it uses less digits than its factorization.

65556110820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944700 (or 3944698 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The spelling of 65556110820 in words is "sixty-five billion, five hundred fifty-six million, one hundred ten thousand, eight hundred twenty".