51125560000 has 70 divisors (see below), whose sum is σ = 126774872180. Its totient is φ = 20450208000.

The previous prime is 51125559997. The next prime is 51125560019. The reversal of 51125560000 is 6552115.

It is a super-2 number, since 2×51125560000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 599070 + ... + 679069.

Almost surely, 2^51125560000 is an apocalyptic number.

51125560000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51125560000 is an abundant number, since it is smaller than the sum of its proper divisors (75649312180).

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

51125560000 is an equidigital number, since it uses as much as digits as its factorization.

51125560000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278171 (or 1278146 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The spelling of 51125560000 in words is "fifty-one billion, one hundred twenty-five million, five hundred sixty thousand".