77947874977 has 8 divisors (see below), whose sum is σ = 89105990400. Its totient is φ = 66795435744.

The previous prime is 77947874959. The next prime is 77947874987.

77947874977 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77947874977 - 2²³ = 77939486369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77947874987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1389577 + ... + 1444582.

It is an arithmetic number, because the mean of its divisors is an integer number (11138248800).

Almost surely, 2^77947874977 is an apocalyptic number.

It is an amenable number.

77947874977 is a deficient number, since it is larger than the sum of its proper divisors (11158115423).

77947874977 is a wasteful number, since it uses less digits than its factorization.

77947874977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2838095.

The product of its digits is 1219784832, while the sum is 76.

The spelling of 77947874977 in words is "seventy-seven billion, nine hundred forty-seven million, eight hundred seventy-four thousand, nine hundred seventy-seven".