51546818480 has 40 divisors (see below), whose sum is σ = 119856538512. Its totient is φ = 20616975104.

The previous prime is 51546818459. The next prime is 51546818489. The reversal of 51546818480 is 8481864515.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (51546818489) by changing a digit.

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, 1350539 + ... + 1388181.

Almost surely, 2^51546818480 is an apocalyptic number.

It is an amenable number.

51546818480 is an abundant number, since it is smaller than the sum of its proper divisors (68309720032).

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

51546818480 is a wasteful number, since it uses less digits than its factorization.

51546818480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54773 (or 54767 counting only the distinct ones).

The product of its (nonzero) digits is 1228800, while the sum is 50.

The spelling of 51546818480 in words is "fifty-one billion, five hundred forty-six million, eight hundred eighteen thousand, four hundred eighty".