97817793975 has 36 divisors (see below), whose sum is σ = 191130045912. Its totient is φ = 47426808000.

The previous prime is 97817793961. The next prime is 97817794001. The reversal of 97817793975 is 57939771879.

97817793975 is a `hidden beast` number, since 97 + 81 + 7 + 79 + 397 + 5 = 666.

It is not a de Polignac number, because 97817793975 - 2⁶ = 97817793911 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19758696 + ... + 19763645.

It is an arithmetic number, because the mean of its divisors is an integer number (5309167942).

Almost surely, 2^97817793975 is an apocalyptic number.

97817793975 is a deficient number, since it is larger than the sum of its proper divisors (93312251937).

97817793975 is a wasteful number, since it uses less digits than its factorization.

97817793975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39522368 (or 39522360 counting only the distinct ones).

The product of its digits is 210039480, while the sum is 72.

The spelling of 97817793975 in words is "ninety-seven billion, eight hundred seventeen million, seven hundred ninety-three thousand, nine hundred seventy-five".