9126951990 has 64 divisors (see below), whose sum is σ = 23611283136. Its totient is φ = 2244575232.

The previous prime is 9126951989. The next prime is 9126951997. The reversal of 9126951990 is 991596219.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9126951997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 439522 + ... + 459818.

It is an arithmetic number, because the mean of its divisors is an integer number (368926299).

Almost surely, 2^9126951990 is an apocalyptic number.

9126951990 is an abundant number, since it is smaller than the sum of its proper divisors (14484331146).

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

9126951990 is a wasteful number, since it uses less digits than its factorization.

9126951990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21473.

The product of its (nonzero) digits is 393660, while the sum is 51.

The square root of 9126951990 is about 95535.0825089925. The cubic root of 9126951990 is about 2089.8185926504.

The spelling of 9126951990 in words is "nine billion, one hundred twenty-six million, nine hundred fifty-one thousand, nine hundred ninety".