26580491 has 12 divisors (see below), whose sum is σ = 31013928. Its totient is φ = 22714272.

The previous prime is 26580461. The next prime is 26580509. The reversal of 26580491 is 19408562.

It is not a de Polignac number, because 26580491 - 2¹⁴ = 26564107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26580451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21800 + ... + 22986.

It is an arithmetic number, because the mean of its divisors is an integer number (2584494).

Almost surely, 2^26580491 is an apocalyptic number.

26580491 is a deficient number, since it is larger than the sum of its proper divisors (4433437).

26580491 is a wasteful number, since it uses less digits than its factorization.

26580491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658 (or 1651 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 26580491 is about 5155.6271199535. The cubic root of 26580491 is about 298.4381457786.

The spelling of 26580491 in words is "twenty-six million, five hundred eighty thousand, four hundred ninety-one".