677347728849 has 48 divisors (see below), whose sum is σ = 1072625830848. Its totient is φ = 408481920000.

The previous prime is 677347728821. The next prime is 677347728851. The reversal of 677347728849 is 948827743776.

677347728849 is a `hidden beast` number, since 6 + 7 + 73 + 477 + 2 + 8 + 84 + 9 = 666.

677347728849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 677347728849 - 2²³ = 677339340241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (677347728349) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31506994 + ... + 31528484.

It is an arithmetic number, because the mean of its divisors is an integer number (22346371476).

Almost surely, 2^677347728849 is an apocalyptic number.

It is an amenable number.

677347728849 is a deficient number, since it is larger than the sum of its proper divisors (395278101999).

677347728849 is a wasteful number, since it uses less digits than its factorization.

677347728849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23070 (or 23067 counting only the distinct ones).

The product of its digits is 796594176, while the sum is 72.

The spelling of 677347728849 in words is "six hundred seventy-seven billion, three hundred forty-seven million, seven hundred twenty-eight thousand, eight hundred forty-nine".