26730031491 has 12 divisors (see below), whose sum is σ = 39098781280. Its totient is φ = 17594450640.

The previous prime is 26730031469. The next prime is 26730031513. The reversal of 26730031491 is 19413003762.

26730031491 is a `hidden beast` number, since 267 + 300 + 3 + 1 + 4 + 91 = 666.

It is an interprime number because it is at equal distance from previous prime (26730031469) and next prime (26730031513).

It is not a de Polignac number, because 26730031491 - 2¹⁴ = 26730015107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26730031441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18796780 + ... + 18798201.

Almost surely, 2^26730031491 is an apocalyptic number.

26730031491 is a deficient number, since it is larger than the sum of its proper divisors (12368749789).

26730031491 is a wasteful number, since it uses less digits than its factorization.

26730031491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37595066 (or 37595063 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 26730031491 in words is "twenty-six billion, seven hundred thirty million, thirty-one thousand, four hundred ninety-one".