9991254190 has 32 divisors (see below), whose sum is σ = 18581731776. Its totient is φ = 3865854720.

The previous prime is 9991254173. The next prime is 9991254191. The reversal of 9991254190 is 914521999.

It is a super-2 number, since 2×9991254190² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9991254191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95127 + ... + 170386.

It is an arithmetic number, because the mean of its divisors is an integer number (580679118).

Almost surely, 2^9991254190 is an apocalyptic number.

9991254190 is a deficient number, since it is larger than the sum of its proper divisors (8590477586).

9991254190 is a wasteful number, since it uses less digits than its factorization.

9991254190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265644.

The product of its (nonzero) digits is 262440, while the sum is 49.

The square root of 9991254190 is about 99956.2613846676. The cubic root of 9991254190 is about 2153.8064309599.

The spelling of 9991254190 in words is "nine billion, nine hundred ninety-one million, two hundred fifty-four thousand, one hundred ninety".