51695307747 has 24 divisors (see below), whose sum is σ = 75282086880. Its totient is φ = 34182401280.

The previous prime is 51695307659. The next prime is 51695307883. The reversal of 51695307747 is 74770359615.

51695307747 is a `hidden beast` number, since 5 + 1 + 69 + 530 + 7 + 7 + 47 = 666.

51695307747 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 51695307747 - 2⁸ = 51695307491 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51695307693 and 51695307702.

It is not an unprimeable number, because it can be changed into a prime (51695307047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 655579 + ... + 730187.

It is an arithmetic number, because the mean of its divisors is an integer number (3136753620).

Almost surely, 2^51695307747 is an apocalyptic number.

51695307747 is a deficient number, since it is larger than the sum of its proper divisors (23586779133).

51695307747 is a wasteful number, since it uses less digits than its factorization.

51695307747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75243 (or 75240 counting only the distinct ones).

The product of its (nonzero) digits is 5556600, while the sum is 54.

The spelling of 51695307747 in words is "fifty-one billion, six hundred ninety-five million, three hundred seven thousand, seven hundred forty-seven".