51442823568 has 40 divisors (see below), whose sum is σ = 132902431200. Its totient is φ = 17146514944.

The previous prime is 51442823557. The next prime is 51442823611. The reversal of 51442823568 is 86532824415.

It is a Harshad number since it is a multiple of its sum of digits (48).

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 7 ways as a sum of consecutive naturals, for example, 1150168 + ... + 1194056.

It is an arithmetic number, because the mean of its divisors is an integer number (3322560780).

Almost surely, 2^51442823568 is an apocalyptic number.

It is an amenable number.

51442823568 is an abundant number, since it is smaller than the sum of its proper divisors (81459607632).

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

51442823568 is a wasteful number, since it uses less digits than its factorization.

51442823568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68319 (or 68313 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 48.

The spelling of 51442823568 in words is "fifty-one billion, four hundred forty-two million, eight hundred twenty-three thousand, five hundred sixty-eight".