51075377865 has 48 divisors (see below), whose sum is σ = 89450699520. Its totient is φ = 26957473920.

The previous prime is 51075377831. The next prime is 51075377923. The reversal of 51075377865 is 56877357015.

51075377865 is a `hidden beast` number, since 510 + 7 + 53 + 7 + 78 + 6 + 5 = 666.

51075377865 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 51075377865 - 2¹¹ = 51075375817 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9401700 + ... + 9407130.

It is an arithmetic number, because the mean of its divisors is an integer number (1863556240).

Almost surely, 2^51075377865 is an apocalyptic number.

It is an amenable number.

51075377865 is a deficient number, since it is larger than the sum of its proper divisors (38375321655).

51075377865 is a wasteful number, since it uses less digits than its factorization.

51075377865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7574 (or 7571 counting only the distinct ones).

The product of its (nonzero) digits is 6174000, while the sum is 54.

The spelling of 51075377865 in words is "fifty-one billion, seventy-five million, three hundred seventy-seven thousand, eight hundred sixty-five".