51243574356 has 288 divisors, whose sum is σ = 146268082688. Its totient is φ = 15026964480.

The previous prime is 51243574331. The next prime is 51243574363. The reversal of 51243574356 is 65347534215.

51243574356 is a `hidden beast` number, since 5 + 1 + 2 + 43 + 574 + 35 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 139628085 + ... + 139628451.

Almost surely, 2^51243574356 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 51243574356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73134041344).

51243574356 is an abundant number, since it is smaller than the sum of its proper divisors (95024508332).

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

51243574356 is a wasteful number, since it uses less digits than its factorization.

51243574356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591 (or 586 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 45.

The spelling of 51243574356 in words is "fifty-one billion, two hundred forty-three million, five hundred seventy-four thousand, three hundred fifty-six".