9915998454 has 36 divisors (see below), whose sum is σ = 22285325244. Its totient is φ = 3304601064.

The previous prime is 9915998453. The next prime is 9915998501. The reversal of 9915998454 is 4548995199.

9915998454 is a `hidden beast` number, since 9 + 91 + 5 + 9 + 98 + 454 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 9915998391 and 9915998400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9915998453) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2193004 + ... + 2197520.

Almost surely, 2^9915998454 is an apocalyptic number.

9915998454 is an abundant number, since it is smaller than the sum of its proper divisors (12369326790).

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

9915998454 is an frugal number, since it uses more digits than its factorization.

9915998454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9051 (or 4522 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 63.

The square root of 9915998454 is about 99579.1065133645. The cubic root of 9915998454 is about 2148.3851912128.

The spelling of 9915998454 in words is "nine billion, nine hundred fifteen million, nine hundred ninety-eight thousand, four hundred fifty-four".