97780155108779 has 96 divisors (see below), whose sum is σ = 120025427047680. Its totient is φ = 78468420038400.

The previous prime is 97780155108773. The next prime is 97780155108791.

97780155108779 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 97780155108779 - 2⁸ = 97780155108523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97780155108773) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19327958552 + ... + 19327963610.

It is an arithmetic number, because the mean of its divisors is an integer number (1250264865080).

Almost surely, 2^{97780155108779} is an apocalyptic number.

97780155108779 is a deficient number, since it is larger than the sum of its proper divisors (22245271938901).

97780155108779 is a wasteful number, since it uses less digits than its factorization.

97780155108779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5641 (or 5414 counting only the distinct ones).

The product of its (nonzero) digits is 311169600, while the sum is 74.

The spelling of 97780155108779 in words is "ninety-seven trillion, seven hundred eighty billion, one hundred fifty-five million, one hundred eight thousand, seven hundred seventy-nine".