9942565655 has 16 divisors (see below), whose sum is σ = 13018139424. Its totient is φ = 7229614080.

The previous prime is 9942565643. The next prime is 9942565657. The reversal of 9942565655 is 5565652499.

It is a de Polignac number, because none of the positive numbers 2^k-9942565655 is a prime.

It is a super-2 number, since 2×9942565655² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9942565655.

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, 357119 + ... + 383951.

It is an arithmetic number, because the mean of its divisors is an integer number (813633714).

Almost surely, 2^9942565655 is an apocalyptic number.

9942565655 is a deficient number, since it is larger than the sum of its proper divisors (3075573769).

9942565655 is a wasteful number, since it uses less digits than its factorization.

9942565655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33586.

The product of its digits is 14580000, while the sum is 56.

The square root of 9942565655 is about 99712.4147486159. The cubic root of 9942565655 is about 2150.3021500719.

The spelling of 9942565655 in words is "nine billion, nine hundred forty-two million, five hundred sixty-five thousand, six hundred fifty-five".