76899994889 has 4 divisors (see below), whose sum is σ = 76903803924. Its totient is φ = 76896185856.

The previous prime is 76899994877. The next prime is 76899994891. The reversal of 76899994889 is 98849999867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98849999867 = 42463 ⋅2327909.

It can be written as a sum of positive squares in 2 ways, for example, as 46955422864 + 29944572025 = 216692^2 + 173045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76899994889 is a prime.

It is a super-2 number, since 2×76899994889² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 76899994889.

It is not an unprimeable number, because it can be changed into a prime (76899994189) 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, 1874072 + ... + 1914665.

It is an arithmetic number, because the mean of its divisors is an integer number (19225950981).

Almost surely, 2^76899994889 is an apocalyptic number.

It is an amenable number.

76899994889 is a deficient number, since it is larger than the sum of its proper divisors (3809035).

76899994889 is a wasteful number, since it uses less digits than its factorization.

76899994889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3809034.

The product of its digits is 5079158784, while the sum is 86.

The spelling of 76899994889 in words is "seventy-six billion, eight hundred ninety-nine million, nine hundred ninety-four thousand, eight hundred eighty-nine".