27891666254 has 16 divisors (see below), whose sum is σ = 42552518400. Its totient is φ = 13707559224.

The previous prime is 27891666251. The next prime is 27891666277. The reversal of 27891666254 is 45266619872.

It is a self number, because there is not a number n which added to its sum of digits gives 27891666254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27891666251) 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, 1247627 + ... + 1269785.

It is an arithmetic number, because the mean of its divisors is an integer number (2659532400).

Almost surely, 2^27891666254 is an apocalyptic number.

27891666254 is a deficient number, since it is larger than the sum of its proper divisors (14660852146).

27891666254 is a wasteful number, since it uses less digits than its factorization.

27891666254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32887.

The product of its digits is 8709120, while the sum is 56.

The spelling of 27891666254 in words is "twenty-seven billion, eight hundred ninety-one million, six hundred sixty-six thousand, two hundred fifty-four".