9021644325 has 90 divisors (see below), whose sum is σ = 17212461266. Its totient is φ = 4668010560.

The previous prime is 9021644287. The next prime is 9021644329. The reversal of 9021644325 is 5234461209.

It is a happy number.

9021644325 is a `hidden beast` number, since 9 + 0 + 2 + 1 + 644 + 3 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1911613284 + 7110031041 = 43722^2 + 84321^2 .

It is not a de Polignac number, because 9021644325 - 2¹⁴ = 9021627941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9021644325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9021644329) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 25998802 + ... + 25999148.

Almost surely, 2^9021644325 is an apocalyptic number.

It is an amenable number.

9021644325 is a deficient number, since it is larger than the sum of its proper divisors (8190816941).

9021644325 is an equidigital number, since it uses as much as digits as its factorization.

9021644325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 9021644325 is about 94982.3369106067. The cubic root of 9021644325 is about 2081.7499699748.

The spelling of 9021644325 in words is "nine billion, twenty-one million, six hundred forty-four thousand, three hundred twenty-five".