27741400643 has 4 divisors (see below), whose sum is σ = 30263346168. Its totient is φ = 25219455120.

The previous prime is 27741400639. The next prime is 27741400691. The reversal of 27741400643 is 34600414772.

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 27741400643 - 2² = 27741400639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27741400597 and 27741400606.

It is not an unprimeable number, because it can be changed into a prime (27741403643) 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, 1260972746 + ... + 1260972767.

It is an arithmetic number, because the mean of its divisors is an integer number (7565836542).

Almost surely, 2^27741400643 is an apocalyptic number.

27741400643 is a deficient number, since it is larger than the sum of its proper divisors (2521945525).

27741400643 is a wasteful number, since it uses less digits than its factorization.

27741400643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521945524.

The product of its (nonzero) digits is 112896, while the sum is 38.

The spelling of 27741400643 in words is "twenty-seven billion, seven hundred forty-one million, four hundred thousand, six hundred forty-three".