27771656213 has 8 divisors (see below), whose sum is σ = 31859718528. Its totient is φ = 23713764624.

The previous prime is 27771656173. The next prime is 27771656219. The reversal of 27771656213 is 31265617772.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27771656213 - 2⁶ = 27771656149 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 (27771656219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7540706 + ... + 7544387.

It is an arithmetic number, because the mean of its divisors is an integer number (3982464816).

Almost surely, 2^27771656213 is an apocalyptic number.

It is an amenable number.

27771656213 is a deficient number, since it is larger than the sum of its proper divisors (4088062315).

27771656213 is a wasteful number, since it uses less digits than its factorization.

27771656213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15085363.

The product of its digits is 740880, while the sum is 47.

The spelling of 27771656213 in words is "twenty-seven billion, seven hundred seventy-one million, six hundred fifty-six thousand, two hundred thirteen".