9872117291478 has 32 divisors (see below), whose sum is σ = 21263447100672. Its totient is φ = 3037513802400.

The previous prime is 9872117291453. The next prime is 9872117291483. The reversal of 9872117291478 is 8741927112789.

It is a happy number.

It is a super-2 number, since 2×9872117291478² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2740333 + ... + 5220503.

It is an arithmetic number, because the mean of its divisors is an integer number (664482721896).

Almost surely, 2^{9872117291478} is an apocalyptic number.

9872117291478 is an abundant number, since it is smaller than the sum of its proper divisors (11391329809194).

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

9872117291478 is a wasteful number, since it uses less digits than its factorization.

9872117291478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531220.

The product of its digits is 28449792, while the sum is 66.

The spelling of 9872117291478 in words is "nine trillion, eight hundred seventy-two billion, one hundred seventeen million, two hundred ninety-one thousand, four hundred seventy-eight".