97842944640 has 128 divisors (see below), whose sum is σ = 356427918720. Its totient is φ = 22364098560.

The previous prime is 97842944621. The next prime is 97842944659. The reversal of 97842944640 is 4644924879.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (97842944621) and next prime (97842944659).

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×97842944640² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3626551 + ... + 3653430.

It is an arithmetic number, because the mean of its divisors is an integer number (2784593115).

Almost surely, 2^97842944640 is an apocalyptic number.

It is an amenable number.

97842944640 is an abundant number, since it is smaller than the sum of its proper divisors (258584974080).

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

97842944640 is a wasteful number, since it uses less digits than its factorization.

97842944640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7280010 (or 7279998 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 57.

The spelling of 97842944640 in words is "ninety-seven billion, eight hundred forty-two million, nine hundred forty-four thousand, six hundred forty".