27815804453 has 16 divisors (see below), whose sum is σ = 28289730624. Its totient is φ = 27346999680.

The previous prime is 27815804449. The next prime is 27815804477. The reversal of 27815804453 is 35440851872.

It is a cyclic number.

It is not a de Polignac number, because 27815804453 - 2² = 27815804449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27815804398 and 27815804407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27815804483) 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, 7117526 + ... + 7121432.

It is an arithmetic number, because the mean of its divisors is an integer number (1768108164).

Almost surely, 2^27815804453 is an apocalyptic number.

It is an amenable number.

27815804453 is a deficient number, since it is larger than the sum of its proper divisors (473926171).

27815804453 is a wasteful number, since it uses less digits than its factorization.

27815804453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4532.

The product of its (nonzero) digits is 1075200, while the sum is 47.

The spelling of 27815804453 in words is "twenty-seven billion, eight hundred fifteen million, eight hundred four thousand, four hundred fifty-three".