10609999991 has 2 divisors, whose sum is σ = 10609999992. Its totient is φ = 10609999990.

The previous prime is 10609999937. The next prime is 10610000029. The reversal of 10609999991 is 19999990601.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10609999991 - 2¹⁸ = 10609737847 is a prime.

It is a super-2 number, since 2×10609999991² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10609999391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5304999995 + 5304999996.

It is an arithmetic number, because the mean of its divisors is an integer number (5304999996).

Almost surely, 2^10609999991 is an apocalyptic number.

10609999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10609999991 is an equidigital number, since it uses as much as digits as its factorization.

10609999991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3188646, while the sum is 62.

The spelling of 10609999991 in words is "ten billion, six hundred nine million, nine hundred ninety-nine thousand, nine hundred ninety-one".