97775257779 has 6 divisors (see below), whose sum is σ = 141230927916. Its totient is φ = 65183505180.

The previous prime is 97775257709. The next prime is 97775257787.

97775257779 is a `hidden beast` number, since 97 + 7 + 7 + 525 + 7 + 7 + 7 + 9 = 666.

97775257779 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 97775257779 - 2⁷ = 97775257651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97775257709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5431958757 + ... + 5431958774.

It is an arithmetic number, because the mean of its divisors is an integer number (23538487986).

Almost surely, 2^97775257779 is an apocalyptic number.

97775257779 is a deficient number, since it is larger than the sum of its proper divisors (43455670137).

97775257779 is a wasteful number, since it uses less digits than its factorization.

97775257779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10863917537 (or 10863917534 counting only the distinct ones).

The product of its digits is 476478450, while the sum is 72.

The spelling of 97775257779 in words is "ninety-seven billion, seven hundred seventy-five million, two hundred fifty-seven thousand, seven hundred seventy-nine".