76981864783 has 4 divisors (see below), whose sum is σ = 76989737088. Its totient is φ = 76973992480.

The previous prime is 76981864733. The next prime is 76981864811. The reversal of 76981864783 is 38746818967.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38746818967 = 199 ⋅194707633.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76981864783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76981864703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3921466 + ... + 3941047.

It is an arithmetic number, because the mean of its divisors is an integer number (19247434272).

Almost surely, 2^76981864783 is an apocalyptic number.

76981864783 is a deficient number, since it is larger than the sum of its proper divisors (7872305).

76981864783 is an equidigital number, since it uses as much as digits as its factorization.

76981864783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7872304.

The product of its digits is 97542144, while the sum is 67.

The spelling of 76981864783 in words is "seventy-six billion, nine hundred eighty-one million, eight hundred sixty-four thousand, seven hundred eighty-three".