9991254080 has 28 divisors (see below), whose sum is σ = 23791674540. Its totient is φ = 3996501504.

The previous prime is 9991254079. The next prime is 9991254113. The reversal of 9991254080 is 804521999.

It can be written as a sum of positive squares in 2 ways, for example, as 7862723584 + 2128530496 = 88672^2 + 46136^2 .

It is a super-2 number, since 2×9991254080² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15611015 + ... + 15611654.

Almost surely, 2^9991254080 is an apocalyptic number.

It is an amenable number.

9991254080 is an abundant number, since it is smaller than the sum of its proper divisors (13800420460).

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

9991254080 is a wasteful number, since it uses less digits than its factorization.

9991254080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31222686 (or 31222676 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 9991254080 is about 99956.2608344270. The cubic root of 9991254080 is about 2153.8064230557.

The spelling of 9991254080 in words is "nine billion, nine hundred ninety-one million, two hundred fifty-four thousand, eighty".