97785258779 has 16 divisors (see below), whose sum is σ = 106561998144. Its totient is φ = 89191344000.

The previous prime is 97785258749. The next prime is 97785258847.

97785258779 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 97785258779 - 2¹² = 97785254683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97785258719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 586409 + ... + 734469.

It is an arithmetic number, because the mean of its divisors is an integer number (6660124884).

Almost surely, 2^97785258779 is an apocalyptic number.

97785258779 is a deficient number, since it is larger than the sum of its proper divisors (8776739365).

97785258779 is a wasteful number, since it uses less digits than its factorization.

97785258779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148678.

The product of its digits is 622339200, while the sum is 74.

The spelling of 97785258779 in words is "ninety-seven billion, seven hundred eighty-five million, two hundred fifty-eight thousand, seven hundred seventy-nine".