27971599043 has 16 divisors (see below), whose sum is σ = 30349577664. Its totient is φ = 25675453440.

The previous prime is 27971599039. The next prime is 27971599093. The reversal of 27971599043 is 34099517972.

It is a cyclic number.

It is not a de Polignac number, because 27971599043 - 2² = 27971599039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27971599043.

It is not an unprimeable number, because it can be changed into a prime (27971599093) 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, 3060146 + ... + 3069272.

It is an arithmetic number, because the mean of its divisors is an integer number (1896848604).

Almost surely, 2^27971599043 is an apocalyptic number.

27971599043 is a deficient number, since it is larger than the sum of its proper divisors (2377978621).

27971599043 is a wasteful number, since it uses less digits than its factorization.

27971599043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13582.

The product of its (nonzero) digits is 4286520, while the sum is 56.

The spelling of 27971599043 in words is "twenty-seven billion, nine hundred seventy-one million, five hundred ninety-nine thousand, forty-three".