27661267844 has 12 divisors (see below), whose sum is σ = 55322535744. Its totient is φ = 11854829064.

The previous prime is 27661267831. The next prime is 27661267859. The reversal of 27661267844 is 44876216672.

27661267844 is an admirable number.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493951184 + ... + 493951239.

It is an arithmetic number, because the mean of its divisors is an integer number (4610211312).

Almost surely, 2^27661267844 is an apocalyptic number.

It is an amenable number.

27661267844 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27661267844 is a wasteful number, since it uses less digits than its factorization.

27661267844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987902434 (or 987902432 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 53.

The spelling of 27661267844 in words is "twenty-seven billion, six hundred sixty-one million, two hundred sixty-seven thousand, eight hundred forty-four".