9901691065 has 16 divisors (see below), whose sum is σ = 14294171520. Its totient is φ = 6432376320.

The previous prime is 9901691057. The next prime is 9901691071. The reversal of 9901691065 is 5601961099.

It is not a de Polignac number, because 9901691065 - 2³ = 9901691057 is a prime.

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, 7444216 + ... + 7445545.

It is an arithmetic number, because the mean of its divisors is an integer number (893385720).

Almost surely, 2^9901691065 is an apocalyptic number.

9901691065 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9901691065 is a deficient number, since it is larger than the sum of its proper divisors (4392480455).

9901691065 is a wasteful number, since it uses less digits than its factorization.

9901691065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14889792.

The product of its (nonzero) digits is 131220, while the sum is 46.

The square root of 9901691065 is about 99507.2412691659. The cubic root of 9901691065 is about 2147.3514214555.

The spelling of 9901691065 in words is "nine billion, nine hundred one million, six hundred ninety-one thousand, sixty-five".