97868609640 has 192 divisors, whose sum is σ = 334031443200. Its totient is φ = 25767735552.

The previous prime is 97868609623. The next prime is 97868609653. The reversal of 97868609640 is 4690686879.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 704154 + ... + 831606.

It is an arithmetic number, because the mean of its divisors is an integer number (1739747100).

Almost surely, 2^97868609640 is an apocalyptic number.

97868609640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97868609640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167015721600).

97868609640 is an abundant number, since it is smaller than the sum of its proper divisors (236162833560).

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

97868609640 is a wasteful number, since it uses less digits than its factorization.

97868609640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127558 (or 127542 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 97868609640 in words is "ninety-seven billion, eight hundred sixty-eight million, six hundred nine thousand, six hundred forty".