27992564973 has 24 divisors (see below), whose sum is σ = 42928898688. Its totient is φ = 17516068992.

The previous prime is 27992564923. The next prime is 27992564993. The reversal of 27992564973 is 37946529972.

27992564973 is a `hidden beast` number, since 2 + 7 + 9 + 92 + 56 + 497 + 3 = 666.

It is not a de Polignac number, because 27992564973 - 2⁶ = 27992564909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27992564973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27992564903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193111 + ... + 305412.

It is an arithmetic number, because the mean of its divisors is an integer number (1788704112).

Almost surely, 2^27992564973 is an apocalyptic number.

It is an amenable number.

27992564973 is a deficient number, since it is larger than the sum of its proper divisors (14936333715).

27992564973 is a wasteful number, since it uses less digits than its factorization.

27992564973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498913 (or 498910 counting only the distinct ones).

The product of its digits is 51438240, while the sum is 63.

The spelling of 27992564973 in words is "twenty-seven billion, nine hundred ninety-two million, five hundred sixty-four thousand, nine hundred seventy-three".