27156983429 has 4 divisors (see below), whose sum is σ = 27158735340. Its totient is φ = 27155231520.

The previous prime is 27156983417. The next prime is 27156983443. The reversal of 27156983429 is 92438965172.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17246780929 + 9910202500 = 131327^2 + 99550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27156983429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27156983449) 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, 852494 + ... + 883775.

It is an arithmetic number, because the mean of its divisors is an integer number (6789683835).

Almost surely, 2^27156983429 is an apocalyptic number.

It is an amenable number.

27156983429 is a deficient number, since it is larger than the sum of its proper divisors (1751911).

27156983429 is a wasteful number, since it uses less digits than its factorization.

27156983429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751910.

The product of its digits is 6531840, while the sum is 56.

The spelling of 27156983429 in words is "twenty-seven billion, one hundred fifty-six million, nine hundred eighty-three thousand, four hundred twenty-nine".