97579722981840 has 640 divisors, whose sum is σ = 342428480888832. Its totient is φ = 22778084597760.

The previous prime is 97579722981833. The next prime is 97579722981847. The reversal of 97579722981840 is 4818922797579.

It is an interprime number because it is at equal distance from previous prime (97579722981833) and next prime (97579722981847).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97579722981847) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 26933402269 + ... + 26933405891.

Almost surely, 2^{97579722981840} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97579722981840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171214240444416).

97579722981840 is an abundant number, since it is smaller than the sum of its proper divisors (244848757906992).

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

97579722981840 is a wasteful number, since it uses less digits than its factorization.

97579722981840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6467 (or 6461 counting only the distinct ones).

The product of its (nonzero) digits is 1280240640, while the sum is 78.

The spelling of 97579722981840 in words is "ninety-seven trillion, five hundred seventy-nine billion, seven hundred twenty-two million, nine hundred eighty-one thousand, eight hundred forty".