9941990625 has 240 divisors, whose sum is σ = 22020590592. Its totient is φ = 4374000000.

The previous prime is 9941990621. The next prime is 9941990659. The reversal of 9941990625 is 5260991499.

9941990625 is a `hidden beast` number, since 9 + 9 + 4 + 1 + 9 + 9 + 0 + 625 = 666.

It is not a de Polignac number, because 9941990625 - 2² = 9941990621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9941990621) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 54928035 + ... + 54928215.

Almost surely, 2^9941990625 is an apocalyptic number.

It is an amenable number.

9941990625 is an abundant number, since it is smaller than the sum of its proper divisors (12078599967).

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

9941990625 is an equidigital number, since it uses as much as digits as its factorization.

9941990625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 54.

The square root of 9941990625 is about 99709.5312645687. The cubic root of 9941990625 is about 2150.2606949074.

The spelling of 9941990625 in words is "nine billion, nine hundred forty-one million, nine hundred ninety thousand, six hundred twenty-five".