27223642745 has 16 divisors (see below), whose sum is σ = 35328545280. Its totient is φ = 20019486144.

The previous prime is 27223642711. The next prime is 27223642769. The reversal of 27223642745 is 54724632272.

It is a cyclic number.

It is not a de Polignac number, because 27223642745 - 2⁸ = 27223642489 is a prime.

It is a super-2 number, since 2×27223642745² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27223642696 and 27223642705.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 860669 + ... + 891738.

It is an arithmetic number, because the mean of its divisors is an integer number (2208034080).

Almost surely, 2^27223642745 is an apocalyptic number.

It is an amenable number.

27223642745 is a deficient number, since it is larger than the sum of its proper divisors (8104902535).

27223642745 is a wasteful number, since it uses less digits than its factorization.

27223642745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752664.

The product of its digits is 1128960, while the sum is 44.

The spelling of 27223642745 in words is "twenty-seven billion, two hundred twenty-three million, six hundred forty-two thousand, seven hundred forty-five".