77949788794977 has 48 divisors (see below), whose sum is σ = 118454456336384. Its totient is φ = 45513334706400.

The previous prime is 77949788794963. The next prime is 77949788795009.

77949788794977 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 77949788794977 - 2²³ = 77949780406369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77949789794977) 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, 13022023 + ... + 18040860.

Almost surely, 2^{77949788794977} is an apocalyptic number.

It is an amenable number.

77949788794977 is a deficient number, since it is larger than the sum of its proper divisors (40504667541407).

77949788794977 is a wasteful number, since it uses less digits than its factorization.

77949788794977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31063162 (or 31063151 counting only the distinct ones).

The product of its digits is 790420571136, while the sum is 102.

The spelling of 77949788794977 in words is "seventy-seven trillion, nine hundred forty-nine billion, seven hundred eighty-eight million, seven hundred ninety-four thousand, nine hundred seventy-seven".