27947356833451 has 4 divisors (see below), whose sum is σ = 30488025636504. Its totient is φ = 25406688030400.

The previous prime is 27947356833413. The next prime is 27947356833479. The reversal of 27947356833451 is 15433865374972.

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 27947356833451 - 2¹⁹ = 27947356309163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27947356833481) 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, 1270334401510 + ... + 1270334401531.

It is an arithmetic number, because the mean of its divisors is an integer number (7622006409126).

Almost surely, 2^{27947356833451} is an apocalyptic number.

27947356833451 is a deficient number, since it is larger than the sum of its proper divisors (2540668803053).

27947356833451 is a wasteful number, since it uses less digits than its factorization.

27947356833451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540668803052.

The product of its digits is 457228800, while the sum is 67.

The spelling of 27947356833451 in words is "twenty-seven trillion, nine hundred forty-seven billion, three hundred fifty-six million, eight hundred thirty-three thousand, four hundred fifty-one".