51423534720 has 256 divisors, whose sum is σ = 186002956800. Its totient is φ = 13420965888.

The previous prime is 51423534707. The next prime is 51423534733. The reversal of 51423534720 is 2743532415.

51423534720 is a `hidden beast` number, since 51 + 4 + 2 + 3 + 534 + 72 + 0 = 666.

51423534720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51423534707) and next prime (51423534733).

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 31 ways as a sum of consecutive naturals, for example, 780502 + ... + 843818.

It is an arithmetic number, because the mean of its divisors is an integer number (726574050).

Almost surely, 2^51423534720 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 51423534720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93001478400).

51423534720 is an abundant number, since it is smaller than the sum of its proper divisors (134579422080).

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

51423534720 is a wasteful number, since it uses less digits than its factorization.

51423534720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63392 (or 63374 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The spelling of 51423534720 in words is "fifty-one billion, four hundred twenty-three million, five hundred thirty-four thousand, seven hundred twenty".