51545534020 has 24 divisors (see below), whose sum is σ = 109024372800. Its totient is φ = 20469880032.

The previous prime is 51545533981. The next prime is 51545534081. The reversal of 51545534020 is 2043554515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9268000 + ... + 9273559.

It is an arithmetic number, because the mean of its divisors is an integer number (4542682200).

Almost surely, 2^51545534020 is an apocalyptic number.

It is an amenable number.

51545534020 is an abundant number, since it is smaller than the sum of its proper divisors (57478838780).

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

51545534020 is a wasteful number, since it uses less digits than its factorization.

51545534020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18541707 (or 18541705 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 34.

The spelling of 51545534020 in words is "fifty-one billion, five hundred forty-five million, five hundred thirty-four thousand, twenty".