27491270399 has 4 divisors (see below), whose sum is σ = 27509685336. Its totient is φ = 27472855464.

The previous prime is 27491270393. The next prime is 27491270407. The reversal of 27491270399 is 99307219472.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27491270399 - 2⁴ = 27491270383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27491270399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27491270393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9205229 + ... + 9208214.

It is an arithmetic number, because the mean of its divisors is an integer number (6877421334).

Almost surely, 2^27491270399 is an apocalyptic number.

27491270399 is a deficient number, since it is larger than the sum of its proper divisors (18414937).

27491270399 is a wasteful number, since it uses less digits than its factorization.

27491270399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18414936.

The product of its (nonzero) digits is 1714608, while the sum is 53.

The spelling of 27491270399 in words is "twenty-seven billion, four hundred ninety-one million, two hundred seventy thousand, three hundred ninety-nine".