51156560000 has 320 divisors, whose sum is σ = 156762070080. Its totient is φ = 16187904000.

The previous prime is 51156559943. The next prime is 51156560017. The reversal of 51156560000 is 6565115.

It is a tau number, because it is divible by the number of its divisors (320).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7276487 + ... + 7283513.

It is an arithmetic number, because the mean of its divisors is an integer number (489881469).

Almost surely, 2^51156560000 is an apocalyptic number.

51156560000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51156560000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78381035040).

51156560000 is an abundant number, since it is smaller than the sum of its proper divisors (105605510080).

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

51156560000 is an equidigital number, since it uses as much as digits as its factorization.

51156560000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7081 (or 7054 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 51156560000 in words is "fifty-one billion, one hundred fifty-six million, five hundred sixty thousand".