9121749952 has 56 divisors (see below), whose sum is σ = 21586277376. Its totient is φ = 3739346688.

The previous prime is 9121749947. The next prime is 9121749961. The reversal of 9121749952 is 2599471219.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 9121749896 and 9121749905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432328 + ... + 452935.

Almost surely, 2^9121749952 is an apocalyptic number.

9121749952 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

9121749952 is an abundant number, since it is smaller than the sum of its proper divisors (12464527424).

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

9121749952 is a wasteful number, since it uses less digits than its factorization.

9121749952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885305 (or 885295 counting only the distinct ones).

The product of its digits is 408240, while the sum is 49.

The square root of 9121749952 is about 95507.8528289690. The cubic root of 9121749952 is about 2089.4214764383.

The spelling of 9121749952 in words is "nine billion, one hundred twenty-one million, seven hundred forty-nine thousand, nine hundred fifty-two".