77767628496 has 20 divisors (see below), whose sum is σ = 200899707072. Its totient is φ = 25922542816.

The previous prime is 77767628459. The next prime is 77767628573. The reversal of 77767628496 is 69482676777.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77767628496.

It is a congruent number.

It is an unprimeable number.

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, 810079416 + ... + 810079511.

Almost surely, 2^77767628496 is an apocalyptic number.

It is an amenable number.

77767628496 is an abundant number, since it is smaller than the sum of its proper divisors (123132078576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77767628496 is a wasteful number, since it uses less digits than its factorization.

77767628496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620158938 (or 1620158932 counting only the distinct ones).

The product of its digits is 298722816, while the sum is 69.

The spelling of 77767628496 in words is "seventy-seven billion, seven hundred sixty-seven million, six hundred twenty-eight thousand, four hundred ninety-six".