51560997504 has 128 divisors (see below), whose sum is σ = 142199815680. Its totient is φ = 16535777280.

The previous prime is 51560997497. The next prime is 51560997511. The reversal of 51560997504 is 40579906515.

It is an interprime number because it is at equal distance from previous prime (51560997497) and next prime (51560997511).

It is a tau number, because it is divible by the number of its divisors (128).

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, 2046874 + ... + 2071910.

It is an arithmetic number, because the mean of its divisors is an integer number (1110936060).

Almost surely, 2^51560997504 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 51560997504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71099907840).

51560997504 is an abundant number, since it is smaller than the sum of its proper divisors (90638818176).

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

51560997504 is a wasteful number, since it uses less digits than its factorization.

51560997504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25258 (or 25246 counting only the distinct ones).

The product of its (nonzero) digits is 1701000, while the sum is 51.

The spelling of 51560997504 in words is "fifty-one billion, five hundred sixty million, nine hundred ninety-seven thousand, five hundred four".