51770520720 has 240 divisors, whose sum is σ = 175402880640. Its totient is φ = 13683769344.

The previous prime is 51770520653. The next prime is 51770520751. The reversal of 51770520720 is 2702507715.

51770520720 is a `hidden beast` number, since 517 + 70 + 5 + 2 + 0 + 72 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52665349 + ... + 52666331.

It is an arithmetic number, because the mean of its divisors is an integer number (730845336).

Almost surely, 2^51770520720 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 51770520720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87701440320).

51770520720 is an abundant number, since it is smaller than the sum of its proper divisors (123632359920).

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

51770520720 is a wasteful number, since it uses less digits than its factorization.

51770520720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574 (or 1565 counting only the distinct ones).

The product of its (nonzero) digits is 34300, while the sum is 36.

The spelling of 51770520720 in words is "fifty-one billion, seven hundred seventy million, five hundred twenty thousand, seven hundred twenty".