27742636799 has 4 divisors (see below), whose sum is σ = 27764328960. Its totient is φ = 27720944640.

The previous prime is 27742636769. The next prime is 27742636841. The reversal of 27742636799 is 99763624772.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27742636799 is a prime.

It is a super-2 number, since 2×27742636799² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27742636739) 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, 10844162 + ... + 10846719.

It is an arithmetic number, because the mean of its divisors is an integer number (6941082240).

Almost surely, 2^27742636799 is an apocalyptic number.

27742636799 is a deficient number, since it is larger than the sum of its proper divisors (21692161).

27742636799 is a wasteful number, since it uses less digits than its factorization.

27742636799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21692160.

The product of its digits is 48009024, while the sum is 62.

The spelling of 27742636799 in words is "twenty-seven billion, seven hundred forty-two million, six hundred thirty-six thousand, seven hundred ninety-nine".