27942402853 has 4 divisors (see below), whose sum is σ = 27943777228. Its totient is φ = 27941028480.

The previous prime is 27942402749. The next prime is 27942402881. The reversal of 27942402853 is 35820424972.

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 16908581089 + 11033821764 = 130033^2 + 105042^2 .

It is a cyclic number.

It is not a de Polignac number, because 27942402853 - 2¹⁷ = 27942271781 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 (27942432853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656226 + ... + 697507.

It is an arithmetic number, because the mean of its divisors is an integer number (6985944307).

Almost surely, 2^27942402853 is an apocalyptic number.

It is an amenable number.

27942402853 is a deficient number, since it is larger than the sum of its proper divisors (1374375).

27942402853 is a wasteful number, since it uses less digits than its factorization.

27942402853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374374.

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 27942402853 in words is "twenty-seven billion, nine hundred forty-two million, four hundred two thousand, eight hundred fifty-three".