51618541275 has 48 divisors (see below), whose sum is σ = 108371635200. Its totient is φ = 23597045280.

The previous prime is 51618541259. The next prime is 51618541279. The reversal of 51618541275 is 57214581615.

51618541275 is a `hidden beast` number, since 5 + 1 + 618 + 5 + 4 + 1 + 27 + 5 = 666.

51618541275 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51618541275 - 2⁴ = 51618541259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51618541275.

It is not an unprimeable number, because it can be changed into a prime (51618541279) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5457555 + ... + 5467004.

It is an arithmetic number, because the mean of its divisors is an integer number (2257742400).

Almost surely, 2^51618541275 is an apocalyptic number.

51618541275 is an abundant number, since it is smaller than the sum of its proper divisors (56753093925).

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

51618541275 is a wasteful number, since it uses less digits than its factorization.

51618541275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10924585 (or 10924574 counting only the distinct ones).

The product of its digits is 336000, while the sum is 45.

The spelling of 51618541275 in words is "fifty-one billion, six hundred eighteen million, five hundred forty-one thousand, two hundred seventy-five".