61695765863 has 4 divisors (see below), whose sum is σ = 61756193688. Its totient is φ = 61635338040.

The previous prime is 61695765851. The next prime is 61695765947. The reversal of 61695765863 is 36856759616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61695765863 - 2²⁴ = 61678988647 is a prime.

It is a super-2 number, since 2×61695765863² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61695765796 and 61695765805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61695765563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30212381 + ... + 30214422.

It is an arithmetic number, because the mean of its divisors is an integer number (15439048422).

Almost surely, 2^61695765863 is an apocalyptic number.

61695765863 is a deficient number, since it is larger than the sum of its proper divisors (60427825).

61695765863 is a wasteful number, since it uses less digits than its factorization.

61695765863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60427824.

The product of its digits is 48988800, while the sum is 62.

The spelling of 61695765863 in words is "sixty-one billion, six hundred ninety-five million, seven hundred sixty-five thousand, eight hundred sixty-three".