27908919297 has 12 divisors (see below), whose sum is σ = 46071866880. Its totient is φ = 15947953848.

The previous prime is 27908919281. The next prime is 27908919317. The reversal of 27908919297 is 79291980972.

It is not a de Polignac number, because 27908919297 - 2⁴ = 27908919281 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 442998719 = 27908919297 / (2 + 7 + 9 + 0 + 8 + 9 + 1 + 9 + 2 + 9 + 7).

It is not an unprimeable number, because it can be changed into a prime (27908919097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221499297 + ... + 221499422.

It is an arithmetic number, because the mean of its divisors is an integer number (3839322240).

Almost surely, 2^27908919297 is an apocalyptic number.

It is an amenable number.

27908919297 is a deficient number, since it is larger than the sum of its proper divisors (18162947583).

27908919297 is a wasteful number, since it uses less digits than its factorization.

27908919297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442998732 (or 442998729 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 63.

The spelling of 27908919297 in words is "twenty-seven billion, nine hundred eight million, nine hundred nineteen thousand, two hundred ninety-seven".