76649774231 has 2 divisors, whose sum is σ = 76649774232. Its totient is φ = 76649774230.

The previous prime is 76649774221. The next prime is 76649774239. The reversal of 76649774231 is 13247794667.

It is a strong prime.

It is an emirp because it is prime and its reverse (13247794667) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76649774231 is a prime.

It is a super-2 number, since 2×76649774231² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76649774239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38324887115 + 38324887116.

It is an arithmetic number, because the mean of its divisors is an integer number (38324887116).

Almost surely, 2^76649774231 is an apocalyptic number.

76649774231 is a deficient number, since it is larger than the sum of its proper divisors (1).

76649774231 is an equidigital number, since it uses as much as digits as its factorization.

76649774231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 56.

The spelling of 76649774231 in words is "seventy-six billion, six hundred forty-nine million, seven hundred seventy-four thousand, two hundred thirty-one".