97656909390 has 64 divisors (see below), whose sum is σ = 263714918400. Its totient is φ = 25712193312.

The previous prime is 97656909379. The next prime is 97656909419. The reversal of 97656909390 is 9390965679.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2267862 + ... + 2310521.

It is an arithmetic number, because the mean of its divisors is an integer number (4120545600).

Almost surely, 2^97656909390 is an apocalyptic number.

97656909390 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

97656909390 is an abundant number, since it is smaller than the sum of its proper divisors (166058009010).

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

97656909390 is a wasteful number, since it uses less digits than its factorization.

97656909390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4578478 (or 4578472 counting only the distinct ones).

The product of its (nonzero) digits is 24800580, while the sum is 63.

The spelling of 97656909390 in words is "ninety-seven billion, six hundred fifty-six million, nine hundred nine thousand, three hundred ninety".