9861397202997 has 12 divisors (see below), whose sum is σ = 14244274651360. Its totient is φ = 6574248995688.

The previous prime is 9861397202981. The next prime is 9861397203017. The reversal of 9861397202997 is 7992027931689.

9861397202997 is a `hidden beast` number, since 98 + 61 + 397 + 2 + 0 + 2 + 9 + 97 = 666.

It is not a de Polignac number, because 9861397202997 - 2⁴ = 9861397202981 is a prime.

It is a super-3 number, since 3×9861397202997³ (a number of 40 digits) contains 333 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 (9861397202947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3600378 + ... + 5717124.

Almost surely, 2^{9861397202997} is an apocalyptic number.

It is an amenable number.

9861397202997 is a deficient number, since it is larger than the sum of its proper divisors (4382877448363).

9861397202997 is a wasteful number, since it uses less digits than its factorization.

9861397202997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634392 (or 2634389 counting only the distinct ones).

The product of its (nonzero) digits is 185177664, while the sum is 72.

The spelling of 9861397202997 in words is "nine trillion, eight hundred sixty-one billion, three hundred ninety-seven million, two hundred two thousand, nine hundred ninety-seven".