9664610747715 has 144 divisors (see below), whose sum is σ = 21385863233280. Its totient is φ = 3992409267840.

The previous prime is 9664610747681. The next prime is 9664610747731. The reversal of 9664610747715 is 5177470164669.

9664610747715 is a `hidden beast` number, since 9 + 6 + 6 + 4 + 610 + 7 + 4 + 7 + 7 + 1 + 5 = 666.

It is not a de Polignac number, because 9664610747715 - 2⁸ = 9664610747459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2857596 + ... + 5243574.

It is an arithmetic number, because the mean of its divisors is an integer number (148512939120).

Almost surely, 2^{9664610747715} is an apocalyptic number.

9664610747715 is an abundant number, since it is smaller than the sum of its proper divisors (11721252485565).

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

9664610747715 is a wasteful number, since it uses less digits than its factorization.

9664610747715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386182 (or 2386172 counting only the distinct ones).

The product of its (nonzero) digits is 53343360, while the sum is 63.

The spelling of 9664610747715 in words is "nine trillion, six hundred sixty-four billion, six hundred ten million, seven hundred forty-seven thousand, seven hundred fifteen".