9942565656 has 64 divisors (see below), whose sum is σ = 25275697920. Its totient is φ = 3258541440.

The previous prime is 9942565643. The next prime is 9942565657. The reversal of 9942565656 is 6565652499.

It is a happy number.

It is a super-2 number, since 2×9942565656² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9942565596 and 9942565605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9942565657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 627771 + ... + 643413.

It is an arithmetic number, because the mean of its divisors is an integer number (394932780).

Almost surely, 2^9942565656 is an apocalyptic number.

It is an amenable number.

9942565656 is an abundant number, since it is smaller than the sum of its proper divisors (15333132264).

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

9942565656 is a wasteful number, since it uses less digits than its factorization.

9942565656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16096 (or 16092 counting only the distinct ones).

The product of its digits is 17496000, while the sum is 57.

The square root of 9942565656 is about 99712.4147536304. The cubic root of 9942565656 is about 2150.3021501440.

The spelling of 9942565656 in words is "nine billion, nine hundred forty-two million, five hundred sixty-five thousand, six hundred fifty-six".