27917491983 has 16 divisors (see below), whose sum is σ = 37864930656. Its totient is φ = 18291363840.

The previous prime is 27917491969. The next prime is 27917492027. The reversal of 27917491983 is 38919471972.

It is not a de Polignac number, because 27917491983 - 2²¹ = 27915394831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27917491913) 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, 160035 + ... + 285387.

It is an arithmetic number, because the mean of its divisors is an integer number (2366558166).

Almost surely, 2^27917491983 is an apocalyptic number.

27917491983 is a deficient number, since it is larger than the sum of its proper divisors (9947438673).

27917491983 is a wasteful number, since it uses less digits than its factorization.

27917491983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126634.

The product of its digits is 6858432, while the sum is 60.

The spelling of 27917491983 in words is "twenty-seven billion, nine hundred seventeen million, four hundred ninety-one thousand, nine hundred eighty-three".