76688291861 has 4 divisors (see below), whose sum is σ = 76787501292. Its totient is φ = 76589082432.

The previous prime is 76688291747. The next prime is 76688291873. The reversal of 76688291861 is 16819288667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16819288667 = 991 ⋅16972037.

It can be written as a sum of positive squares in 2 ways, for example, as 35993298961 + 40694992900 = 189719^2 + 201730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76688291861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76688291794 and 76688291803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76688281861) 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, 49603556 + ... + 49605101.

It is an arithmetic number, because the mean of its divisors is an integer number (19196875323).

Almost surely, 2^76688291861 is an apocalyptic number.

It is an amenable number.

76688291861 is a deficient number, since it is larger than the sum of its proper divisors (99209431).

76688291861 is an equidigital number, since it uses as much as digits as its factorization.

76688291861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99209430.

The product of its digits is 13934592, while the sum is 62.

The spelling of 76688291861 in words is "seventy-six billion, six hundred eighty-eight million, two hundred ninety-one thousand, eight hundred sixty-one".