273372105661 has 2 divisors, whose sum is σ = 273372105662. Its totient is φ = 273372105660.

The previous prime is 273372105563. The next prime is 273372105709. The reversal of 273372105661 is 166501273372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179915947225 + 93456158436 = 424165^2 + 305706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-273372105661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (273372105361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136686052830 + 136686052831.

It is an arithmetic number, because the mean of its divisors is an integer number (136686052831).

Almost surely, 2^273372105661 is an apocalyptic number.

It is an amenable number.

273372105661 is a deficient number, since it is larger than the sum of its proper divisors (1).

273372105661 is an equidigital number, since it uses as much as digits as its factorization.

273372105661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 43.

The spelling of 273372105661 in words is "two hundred seventy-three billion, three hundred seventy-two million, one hundred five thousand, six hundred sixty-one".