27292438661 has 2 divisors, whose sum is σ = 27292438662. Its totient is φ = 27292438660.

The previous prime is 27292438651. The next prime is 27292438703. The reversal of 27292438661 is 16683429272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22515002500 + 4777436161 = 150050^2 + 69119^2 .

It is a cyclic number.

It is not a de Polignac number, because 27292438661 - 2⁶ = 27292438597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27292438651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13646219330 + 13646219331.

It is an arithmetic number, because the mean of its divisors is an integer number (13646219331).

Almost surely, 2^27292438661 is an apocalyptic number.

It is an amenable number.

27292438661 is a deficient number, since it is larger than the sum of its proper divisors (1).

27292438661 is an equidigital number, since it uses as much as digits as its factorization.

27292438661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 50.

The spelling of 27292438661 in words is "twenty-seven billion, two hundred ninety-two million, four hundred thirty-eight thousand, six hundred sixty-one".