9942565680 has 120 divisors (see below), whose sum is σ = 33937984080. Its totient is φ = 2607874560.

The previous prime is 9942565679. The next prime is 9942565681. The reversal of 9942565680 is 865652499.

It is a happy number.

9942565680 is a `hidden beast` number, since 99 + 425 + 6 + 56 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (9942565679) and next prime (9942565681).

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×9942565680² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9942565681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69270 + ... + 157109.

It is an arithmetic number, because the mean of its divisors is an integer number (282816534).

Almost surely, 2^9942565680 is an apocalyptic number.

9942565680 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9942565680 is an abundant number, since it is smaller than the sum of its proper divisors (23995418400).

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

9942565680 is a wasteful number, since it uses less digits than its factorization.

9942565680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226459 (or 226450 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The square root of 9942565680 is about 99712.4148739765. The cubic root of 9942565680 is about 2150.3021518742.

The spelling of 9942565680 in words is "nine billion, nine hundred forty-two million, five hundred sixty-five thousand, six hundred eighty".