26161109 has 16 divisors (see below), whose sum is σ = 29219568. Its totient is φ = 23265792.

The previous prime is 26161063. The next prime is 26161123. The reversal of 26161109 is 90116162.

It can be written as a sum of positive squares in 8 ways, for example, as 688900 + 25472209 = 830^2 + 5047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26161109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26161169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65699 + ... + 66095.

It is an arithmetic number, because the mean of its divisors is an integer number (1826223).

Almost surely, 2^26161109 is an apocalyptic number.

It is an amenable number.

26161109 is a deficient number, since it is larger than the sum of its proper divisors (3058459).

26161109 is a wasteful number, since it uses less digits than its factorization.

26161109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 26161109 is about 5114.7931531979. The cubic root of 26161109 is about 296.8602508499.

The spelling of 26161109 in words is "twenty-six million, one hundred sixty-one thousand, one hundred nine".