27293725891 has 16 divisors (see below), whose sum is σ = 28808156160. Its totient is φ = 25787211840.

The previous prime is 27293725883. The next prime is 27293725909. The reversal of 27293725891 is 19852739272.

It is a cyclic number.

It is not a de Polignac number, because 27293725891 - 2³ = 27293725883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27293725831) 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, 18354150 + ... + 18355636.

It is an arithmetic number, because the mean of its divisors is an integer number (1800509760).

Almost surely, 2^27293725891 is an apocalyptic number.

27293725891 is a deficient number, since it is larger than the sum of its proper divisors (1514430269).

27293725891 is a wasteful number, since it uses less digits than its factorization.

27293725891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3474.

The product of its digits is 3810240, while the sum is 55.

The spelling of 27293725891 in words is "twenty-seven billion, two hundred ninety-three million, seven hundred twenty-five thousand, eight hundred ninety-one".