9121618825 has 24 divisors (see below), whose sum is σ = 12367333440. Its totient is φ = 6618705600.

The previous prime is 9121618789. The next prime is 9121618841. The reversal of 9121618825 is 5288161219.

It is not a de Polignac number, because 9121618825 - 2¹⁵ = 9121586057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82947 + ... + 158503.

It is an arithmetic number, because the mean of its divisors is an integer number (515305560).

Almost surely, 2^9121618825 is an apocalyptic number.

It is an amenable number.

9121618825 is a deficient number, since it is larger than the sum of its proper divisors (3245714615).

9121618825 is a wasteful number, since it uses less digits than its factorization.

9121618825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76017 (or 76012 counting only the distinct ones).

The product of its digits is 69120, while the sum is 43.

The square root of 9121618825 is about 95507.1663541538. The cubic root of 9121618825 is about 2089.4114644383.

The spelling of 9121618825 in words is "nine billion, one hundred twenty-one million, six hundred eighteen thousand, eight hundred twenty-five".