274945675661 has 2 divisors, whose sum is σ = 274945675662. Its totient is φ = 274945675660.

The previous prime is 274945675651. The next prime is 274945675709. The reversal of 274945675661 is 166576549472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144574852900 + 130370822761 = 380230^2 + 361069^2 .

It is a cyclic number.

It is not a de Polignac number, because 274945675661 - 2²² = 274941481357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 274945675594 and 274945675603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (274945675651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137472837830 + 137472837831.

It is an arithmetic number, because the mean of its divisors is an integer number (137472837831).

Almost surely, 2^274945675661 is an apocalyptic number.

It is an amenable number.

274945675661 is a deficient number, since it is larger than the sum of its proper divisors (1).

274945675661 is an equidigital number, since it uses as much as digits as its factorization.

274945675661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76204800, while the sum is 62.

The spelling of 274945675661 in words is "two hundred seventy-four billion, nine hundred forty-five million, six hundred seventy-five thousand, six hundred sixty-one".