27901290289 has 4 divisors (see below), whose sum is σ = 27901633024. Its totient is φ = 27900947556.

The previous prime is 27901290257. The next prime is 27901290293. The reversal of 27901290289 is 98209210972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 27901290289 - 2⁵ = 27901290257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27901290229) 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, 28264 + ... + 237910.

It is an arithmetic number, because the mean of its divisors is an integer number (6975408256).

Almost surely, 2^27901290289 is an apocalyptic number.

It is an amenable number.

27901290289 is a deficient number, since it is larger than the sum of its proper divisors (342735).

27901290289 is a wasteful number, since it uses less digits than its factorization.

27901290289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342734.

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 27901290289 in words is "twenty-seven billion, nine hundred one million, two hundred ninety thousand, two hundred eighty-nine".