51476847840 has 672 divisors, whose sum is σ = 202934634336. Its totient is φ = 12227604480.

The previous prime is 51476847823. The next prime is 51476847853. The reversal of 51476847840 is 4874867415.

51476847840 is a `hidden beast` number, since 51 + 476 + 8 + 47 + 84 + 0 = 666.

51476847840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 68000742 + ... + 68001498.

It is an arithmetic number, because the mean of its divisors is an integer number (301986063).

Almost surely, 2^51476847840 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 51476847840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101467317168).

51476847840 is an abundant number, since it is smaller than the sum of its proper divisors (151457786496).

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

51476847840 is a wasteful number, since it uses less digits than its factorization.

51476847840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854 (or 831 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 54.

The spelling of 51476847840 in words is "fifty-one billion, four hundred seventy-six million, eight hundred forty-seven thousand, eight hundred forty".