9661497808319 has 32 divisors (see below), whose sum is σ = 11533265088000. Its totient is φ = 7920264240000.

The previous prime is 9661497808283. The next prime is 9661497808327. The reversal of 9661497808319 is 9138087941669.

It is not a de Polignac number, because 9661497808319 - 2¹² = 9661497804223 is a prime.

It is a super-2 number, since 2×9661497808319² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661497808219) 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, 343823732 + ... + 343851830.

It is an arithmetic number, because the mean of its divisors is an integer number (360414534000).

Almost surely, 2^{9661497808319} is an apocalyptic number.

9661497808319 is a deficient number, since it is larger than the sum of its proper divisors (1871767279681).

9661497808319 is a wasteful number, since it uses less digits than its factorization.

9661497808319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50703.

The product of its (nonzero) digits is 141087744, while the sum is 71.

The spelling of 9661497808319 in words is "nine trillion, six hundred sixty-one billion, four hundred ninety-seven million, eight hundred eight thousand, three hundred nineteen".