27657314861 has 4 divisors (see below), whose sum is σ = 30171616224. Its totient is φ = 25143013500.

The previous prime is 27657314833. The next prime is 27657314879. The reversal of 27657314861 is 16841375672.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27657314861 - 2²⁶ = 27590205997 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 (27657314801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1257150665 + ... + 1257150686.

It is an arithmetic number, because the mean of its divisors is an integer number (7542904056).

Almost surely, 2^27657314861 is an apocalyptic number.

It is an amenable number.

27657314861 is a deficient number, since it is larger than the sum of its proper divisors (2514301363).

27657314861 is a wasteful number, since it uses less digits than its factorization.

27657314861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514301362.

The product of its digits is 1693440, while the sum is 50.

The spelling of 27657314861 in words is "twenty-seven billion, six hundred fifty-seven million, three hundred fourteen thousand, eight hundred sixty-one".