9659715946881 has 32 divisors (see below), whose sum is σ = 17292918064128. Its totient is φ = 4632031621440.

The previous prime is 9659715946877. The next prime is 9659715946939. The reversal of 9659715946881 is 1886495179569.

It is not a de Polignac number, because 9659715946881 - 2² = 9659715946877 is a prime.

It is a super-2 number, since 2×9659715946881² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9659715946797 and 9659715946806.

It is not an unprimeable number, because it can be changed into a prime (9659715946681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1608341311 + ... + 1608347316.

It is an arithmetic number, because the mean of its divisors is an integer number (540403689504).

Almost surely, 2^{9659715946881} is an apocalyptic number.

9659715946881 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

9659715946881 is a deficient number, since it is larger than the sum of its proper divisors (7633202117247).

9659715946881 is a wasteful number, since it uses less digits than its factorization.

9659715946881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216688661.

The product of its digits is 1175731200, while the sum is 78.

The spelling of 9659715946881 in words is "nine trillion, six hundred fifty-nine billion, seven hundred fifteen million, nine hundred forty-six thousand, eight hundred eighty-one".