51291242496 has 360 divisors, whose sum is σ = 165644786944. Its totient is φ = 15765995520.

The previous prime is 51291242467. The next prime is 51291242533. The reversal of 51291242496 is 69424219215.

51291242496 is a `hidden beast` number, since 5 + 129 + 12 + 424 + 96 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51756561 + ... + 51757551.

Almost surely, 2^51291242496 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 51291242496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82822393472).

51291242496 is an abundant number, since it is smaller than the sum of its proper divisors (114353544448).

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

51291242496 is an frugal number, since it uses more digits than its factorization.

51291242496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047 (or 1009 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 51291242496 in words is "fifty-one billion, two hundred ninety-one million, two hundred forty-two thousand, four hundred ninety-six".