10165220991 has 12 divisors (see below), whose sum is σ = 14733213768. Its totient is φ = 6753683184.

The previous prime is 10165220963. The next prime is 10165220993. The reversal of 10165220991 is 19902256101.

It is not a de Polignac number, because 10165220991 - 2¹⁴ = 10165204607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10165220993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1924785 + ... + 1930058.

It is an arithmetic number, because the mean of its divisors is an integer number (1227767814).

Almost surely, 2^10165220991 is an apocalyptic number.

10165220991 is a deficient number, since it is larger than the sum of its proper divisors (4567992777).

10165220991 is a wasteful number, since it uses less digits than its factorization.

10165220991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855142 (or 3855139 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The spelling of 10165220991 in words is "ten billion, one hundred sixty-five million, two hundred twenty thousand, nine hundred ninety-one".