51620481792 has 576 divisors, whose sum is σ = 174278307840. Its totient is φ = 15054336000.

The previous prime is 51620481713. The next prime is 51620481817. The reversal of 51620481792 is 29718402615.

51620481792 is a `hidden beast` number, since 5 + 1 + 620 + 4 + 8 + 17 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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, 285195942 + ... + 285196122.

Almost surely, 2^51620481792 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 51620481792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87139153920).

51620481792 is an abundant number, since it is smaller than the sum of its proper divisors (122657826048).

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

51620481792 is a wasteful number, since it uses less digits than its factorization.

51620481792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 51620481792 in words is "fifty-one billion, six hundred twenty million, four hundred eighty-one thousand, seven hundred ninety-two".