9890964645 has 16 divisors (see below), whose sum is σ = 15832132992. Its totient is φ = 5272984640.

The previous prime is 9890964607. The next prime is 9890964673. The reversal of 9890964645 is 5464690989.

It is not a de Polignac number, because 9890964645 - 2⁸ = 9890964389 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99726 + ... + 172415.

It is an arithmetic number, because the mean of its divisors is an integer number (989508312).

Almost surely, 2^9890964645 is an apocalyptic number.

It is an amenable number.

9890964645 is a deficient number, since it is larger than the sum of its proper divisors (5941168347).

9890964645 is a wasteful number, since it uses less digits than its factorization.

9890964645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274572.

The product of its (nonzero) digits is 16796160, while the sum is 60.

The square root of 9890964645 is about 99453.3289789739. The cubic root of 9890964645 is about 2146.5757386155.

The spelling of 9890964645 in words is "nine billion, eight hundred ninety million, nine hundred sixty-four thousand, six hundred forty-five".