51253858836 has 192 divisors, whose sum is σ = 138568550400. Its totient is φ = 16369661952.

The previous prime is 51253858811. The next prime is 51253858867. The reversal of 51253858836 is 63885835215.

It is a happy number.

51253858836 is a `hidden beast` number, since 5 + 1 + 2 + 53 + 8 + 588 + 3 + 6 = 666.

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 63 ways as a sum of consecutive naturals, for example, 100694950 + ... + 100695458.

It is an arithmetic number, because the mean of its divisors is an integer number (721711200).

Almost surely, 2^51253858836 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 51253858836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69284275200).

51253858836 is an abundant number, since it is smaller than the sum of its proper divisors (87314691564).

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

51253858836 is a wasteful number, since it uses less digits than its factorization.

51253858836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895 (or 887 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 54.

The spelling of 51253858836 in words is "fifty-one billion, two hundred fifty-three million, eight hundred fifty-eight thousand, eight hundred thirty-six".