51807615104 has 64 divisors (see below), whose sum is σ = 118150402560. Its totient is φ = 22166452224.

The previous prime is 51807615031. The next prime is 51807615109. The reversal of 51807615104 is 40151670815.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (51807615109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496244 + ... + 591500.

It is an arithmetic number, because the mean of its divisors is an integer number (1846100040).

Almost surely, 2^51807615104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51807615104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59075201280).

51807615104 is an abundant number, since it is smaller than the sum of its proper divisors (66342787456).

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

51807615104 is an equidigital number, since it uses as much as digits as its factorization.

51807615104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95885 (or 95873 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 38.

The spelling of 51807615104 in words is "fifty-one billion, eight hundred seven million, six hundred fifteen thousand, one hundred four".