97990775792 has 40 divisors (see below), whose sum is σ = 233670314976. Its totient is φ = 38765581056.

The previous prime is 97990775783. The next prime is 97990775797. The reversal of 97990775792 is 29757709979.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97990775797) 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, 33649223 + ... + 33652134.

Almost surely, 2^97990775792 is an apocalyptic number.

It is an amenable number.

97990775792 is an abundant number, since it is smaller than the sum of its proper divisors (135679539184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97990775792 is a wasteful number, since it uses less digits than its factorization.

97990775792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67301385 (or 67301379 counting only the distinct ones).

The product of its (nonzero) digits is 157529610, while the sum is 71.

The spelling of 97990775792 in words is "ninety-seven billion, nine hundred ninety million, seven hundred seventy-five thousand, seven hundred ninety-two".