26772161 has 24 divisors (see below), whose sum is σ = 32051880. Its totient is φ = 22150656.

The previous prime is 26772157. The next prime is 26772169. The reversal of 26772161 is 16127762.

It can be written as a sum of positive squares in 4 ways, for example, as 8667136 + 18105025 = 2944^2 + 4255^2 .

It is not a de Polignac number, because 26772161 - 2² = 26772157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26772169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116795 + ... + 117023.

It is an arithmetic number, because the mean of its divisors is an integer number (1335495).

Almost surely, 2^26772161 is an apocalyptic number.

It is an amenable number.

26772161 is a deficient number, since it is larger than the sum of its proper divisors (5279719).

26772161 is a wasteful number, since it uses less digits than its factorization.

26772161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 282 counting only the distinct ones).

The product of its digits is 7056, while the sum is 32.

The square root of 26772161 is about 5174.1821575975. The cubic root of 26772161 is about 299.1537670623.

The spelling of 26772161 in words is "twenty-six million, seven hundred seventy-two thousand, one hundred sixty-one".