76776490566181 has 4 divisors (see below), whose sum is σ = 87744560647072. Its totient is φ = 65808420485292.

The previous prime is 76776490566179. The next prime is 76776490566221. The reversal of 76776490566181 is 18166509467767.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 76776490566181 - 2¹ = 76776490566179 is a prime.

It is a super-2 number, since 2×76776490566181² (a number of 29 digits) contains 22 as substring.

It is the 8762220-th Hogben number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76776490266181) by changing a digit.

It is a nontrivial repunit in base 8762219.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5484035040435 + ... + 5484035040448.

It is an arithmetic number, because the mean of its divisors is an integer number (21936140161768).

Almost surely, 2^{76776490566181} is an apocalyptic number.

It is an amenable number.

76776490566181 is a deficient number, since it is larger than the sum of its proper divisors (10968070080891).

76776490566181 is a wasteful number, since it uses less digits than its factorization.

76776490566181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10968070080890.

The product of its (nonzero) digits is 640120320, while the sum is 73.

The spelling of 76776490566181 in words is "seventy-six trillion, seven hundred seventy-six billion, four hundred ninety million, five hundred sixty-six thousand, one hundred eighty-one".