51857185480 has 64 divisors (see below), whose sum is σ = 117926280000. Its totient is φ = 20521401600.

The previous prime is 51857185381. The next prime is 51857185487. The reversal of 51857185480 is 8458175815.

51857185480 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51857185487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6051679 + ... + 6060241.

It is an arithmetic number, because the mean of its divisors is an integer number (1842598125).

Almost surely, 2^51857185480 is an apocalyptic number.

It is an amenable number.

51857185480 is an abundant number, since it is smaller than the sum of its proper divisors (66069094520).

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

51857185480 is a wasteful number, since it uses less digits than its factorization.

51857185480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10174 (or 10170 counting only the distinct ones).

The product of its (nonzero) digits is 1792000, while the sum is 52.

The spelling of 51857185480 in words is "fifty-one billion, eight hundred fifty-seven million, one hundred eighty-five thousand, four hundred eighty".