9637608590021 has 2 divisors, whose sum is σ = 9637608590022. Its totient is φ = 9637608590020.

The previous prime is 9637608590003. The next prime is 9637608590107. The reversal of 9637608590021 is 1200958067369.

It is a happy number.

9637608590021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6068856885025 + 3568751704996 = 2463505^2 + 1889114^2 .

It is a cyclic number.

It is not a de Polignac number, because 9637608590021 - 2¹⁰ = 9637608588997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9637608590221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4818804295010 + 4818804295011.

It is an arithmetic number, because the mean of its divisors is an integer number (4818804295011).

Almost surely, 2^{9637608590021} is an apocalyptic number.

It is an amenable number.

9637608590021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9637608590021 is an equidigital number, since it uses as much as digits as its factorization.

9637608590021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 9637608590021 in words is "nine trillion, six hundred thirty-seven billion, six hundred eight million, five hundred ninety thousand, twenty-one".