9997298602561 has 4 divisors (see below), whose sum is σ = 9999668196400. Its totient is φ = 9994929008724.

The previous prime is 9997298602519. The next prime is 9997298602601. The reversal of 9997298602561 is 1652068927999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9997298602561 - 2³³ = 9988708667969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9997298632561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1184790591 + ... + 1184799028.

It is an arithmetic number, because the mean of its divisors is an integer number (2499917049100).

Almost surely, 2^{9997298602561} is an apocalyptic number.

It is an amenable number.

9997298602561 is a deficient number, since it is larger than the sum of its proper divisors (2369593839).

9997298602561 is a wasteful number, since it uses less digits than its factorization.

9997298602561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2369593838.

The product of its (nonzero) digits is 264539520, while the sum is 73.

The spelling of 9997298602561 in words is "nine trillion, nine hundred ninety-seven billion, two hundred ninety-eight million, six hundred two thousand, five hundred sixty-one".