51607773840 has 320 divisors, whose sum is σ = 185748111360. Its totient is φ = 11609395200.

The previous prime is 51607773821. The next prime is 51607773883. The reversal of 51607773840 is 4837770615.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 51607773840.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 79764397 + ... + 79765043.

It is an arithmetic number, because the mean of its divisors is an integer number (580462848).

Almost surely, 2^51607773840 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 51607773840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92874055680).

51607773840 is an abundant number, since it is smaller than the sum of its proper divisors (134140337520).

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

51607773840 is a wasteful number, since it uses less digits than its factorization.

51607773840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350 (or 1344 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 48.

The spelling of 51607773840 in words is "fifty-one billion, six hundred seven million, seven hundred seventy-three thousand, eight hundred forty".