27971204685 has 32 divisors (see below), whose sum is σ = 46742590080. Its totient is φ = 14268757248.

The previous prime is 27971204663. The next prime is 27971204699. The reversal of 27971204685 is 58640217972.

It is a happy number.

It is not a de Polignac number, because 27971204685 - 2¹⁶ = 27971139149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 394362 + ... + 459851.

It is an arithmetic number, because the mean of its divisors is an integer number (1460705940).

Almost surely, 2^27971204685 is an apocalyptic number.

It is an amenable number.

27971204685 is a deficient number, since it is larger than the sum of its proper divisors (18771385395).

27971204685 is a wasteful number, since it uses less digits than its factorization.

27971204685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854317.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 27971204685 in words is "twenty-seven billion, nine hundred seventy-one million, two hundred four thousand, six hundred eighty-five".