51520542044 has 24 divisors (see below), whose sum is σ = 94920201600. Its totient is φ = 24400882800.

The previous prime is 51520542043. The next prime is 51520542079. The reversal of 51520542044 is 44024502515.

It is a self number, because there is not a number n which added to its sum of digits gives 51520542044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51520542043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512567 + ... + 604785.

It is an arithmetic number, because the mean of its divisors is an integer number (3955008400).

Almost surely, 2^51520542044 is an apocalyptic number.

It is an amenable number.

51520542044 is a deficient number, since it is larger than the sum of its proper divisors (43399659556).

51520542044 is a wasteful number, since it uses less digits than its factorization.

51520542044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99593 (or 99591 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

The spelling of 51520542044 in words is "fifty-one billion, five hundred twenty million, five hundred forty-two thousand, forty-four".