51533367564 has 96 divisors (see below), whose sum is σ = 140960365056. Its totient is φ = 14345694720.

The previous prime is 51533367551. The next prime is 51533367583. The reversal of 51533367564 is 46576333515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2700922 + ... + 2719934.

It is an arithmetic number, because the mean of its divisors is an integer number (1468337136).

Almost surely, 2^51533367564 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 51533367564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70480182528).

51533367564 is an abundant number, since it is smaller than the sum of its proper divisors (89426997492).

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

51533367564 is a wasteful number, since it uses less digits than its factorization.

51533367564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19855 (or 19853 counting only the distinct ones).

The product of its digits is 3402000, while the sum is 48.

The spelling of 51533367564 in words is "fifty-one billion, five hundred thirty-three million, three hundred sixty-seven thousand, five hundred sixty-four".