9951869953197 has 12 divisors (see below), whose sum is σ = 14393812793724. Its totient is φ = 6625861725120.

The previous prime is 9951869953189. The next prime is 9951869953211. The reversal of 9951869953197 is 7913599681599.

9951869953197 is a `hidden beast` number, since 9 + 9 + 5 + 18 + 69 + 9 + 531 + 9 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3877547784201 + 6074322168996 = 1969149^2 + 2464614^2 .

It is not a de Polignac number, because 9951869953197 - 2³ = 9951869953189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9951869953177) 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, 726513078 + ... + 726526775.

It is an arithmetic number, because the mean of its divisors is an integer number (1199484399477).

Almost surely, 2^{9951869953197} is an apocalyptic number.

It is an amenable number.

9951869953197 is a deficient number, since it is larger than the sum of its proper divisors (4441942840527).

9951869953197 is a wasteful number, since it uses less digits than its factorization.

9951869953197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453040620 (or 1453040617 counting only the distinct ones).

The product of its digits is 1488034800, while the sum is 81.

The spelling of 9951869953197 in words is "nine trillion, nine hundred fifty-one billion, eight hundred sixty-nine million, nine hundred fifty-three thousand, one hundred ninety-seven".