274908749898661 has 2 divisors, whose sum is σ = 274908749898662. Its totient is φ = 274908749898660.

The previous prime is 274908749898583. The next prime is 274908749898721. The reversal of 274908749898661 is 166898947809472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259698671898561 + 15210078000100 = 16115169^2 + 3900010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-274908749898661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (274908749896661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137454374949330 + 137454374949331.

It is an arithmetic number, because the mean of its divisors is an integer number (137454374949331).

Almost surely, 2^{274908749898661} is an apocalyptic number.

It is an amenable number.

274908749898661 is a deficient number, since it is larger than the sum of its proper divisors (1).

274908749898661 is an equidigital number, since it uses as much as digits as its factorization.

274908749898661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21069103104, while the sum is 88.

The spelling of 274908749898661 in words is "two hundred seventy-four trillion, nine hundred eight billion, seven hundred forty-nine million, eight hundred ninety-eight thousand, six hundred sixty-one".