51157544424 has 256 divisors, whose sum is σ = 155514470400. Its totient is φ = 13714541568.

The previous prime is 51157544419. The next prime is 51157544447. The reversal of 51157544424 is 42444575115.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 35949777 + ... + 35951199.

It is an arithmetic number, because the mean of its divisors is an integer number (607478400).

Almost surely, 2^51157544424 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 51157544424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77757235200).

51157544424 is an abundant number, since it is smaller than the sum of its proper divisors (104356925976).

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

51157544424 is a wasteful number, since it uses less digits than its factorization.

51157544424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672 (or 1668 counting only the distinct ones).

The product of its digits is 448000, while the sum is 42.

The spelling of 51157544424 in words is "fifty-one billion, one hundred fifty-seven million, five hundred forty-four thousand, four hundred twenty-four".