27278475494399 has 8 divisors (see below), whose sum is σ = 27725992744320. Its totient is φ = 26830968861600.

The previous prime is 27278475494383. The next prime is 27278475494411. The reversal of 27278475494399 is 99349457487272.

It is a Cunningham number, because it is equal to 5222880²-1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27278475494399 - 2⁴ = 27278475494383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27278475494329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2611442 + ... + 7834320.

It is an arithmetic number, because the mean of its divisors is an integer number (3465749093040).

Almost surely, 2^{27278475494399} is an apocalyptic number.

27278475494399 is a deficient number, since it is larger than the sum of its proper divisors (447517249921).

27278475494399 is an equidigital number, since it uses as much as digits as its factorization.

27278475494399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308561.

The product of its digits is 7681443840, while the sum is 80.

The spelling of 27278475494399 in words is "twenty-seven trillion, two hundred seventy-eight billion, four hundred seventy-five million, four hundred ninety-four thousand, three hundred ninety-nine".