77908755780977 has 8 divisors (see below), whose sum is σ = 84991439363040. Its totient is φ = 70826083768960.

The previous prime is 77908755780967. The next prime is 77908755781019.

77908755780977 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 77908755780977 - 2⁴² = 73510709269873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77908755780967) 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, 17340353 + ... + 21365985.

It is an arithmetic number, because the mean of its divisors is an integer number (10623929920380).

Almost surely, 2^{77908755780977} is an apocalyptic number.

It is an amenable number.

77908755780977 is a deficient number, since it is larger than the sum of its proper divisors (7082683582063).

77908755780977 is a wasteful number, since it uses less digits than its factorization.

77908755780977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5785023.

The product of its (nonzero) digits is 15247310400, while the sum is 86.

The spelling of 77908755780977 in words is "seventy-seven trillion, nine hundred eight billion, seven hundred fifty-five million, seven hundred eighty thousand, nine hundred seventy-seven".