51000555560000 has 140 divisors (see below), whose sum is σ = 133903910429388. Its totient is φ = 19200208896000.

The previous prime is 51000555559991. The next prime is 51000555560011. The reversal of 51000555560000 is 6555500015.

It can be written as a sum of positive squares in 10 ways, for example, as 31628656132096 + 19371899427904 = 5623936^2 + 4401352^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36820409 + ... + 38180408.

Almost surely, 2^{51000555560000} is an apocalyptic number.

51000555560000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51000555560000 is an abundant number, since it is smaller than the sum of its proper divisors (82903354869388).

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

51000555560000 is an equidigital number, since it uses as much as digits as its factorization.

51000555560000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75000866 (or 75000841 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 32.

The spelling of 51000555560000 in words is "fifty-one trillion, five hundred fifty-five million, five hundred sixty thousand".