276394989361 has 2 divisors, whose sum is σ = 276394989362. Its totient is φ = 276394989360.

The previous prime is 276394989293. The next prime is 276394989391. The reversal of 276394989361 is 163989493672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 273587579136 + 2807410225 = 523056^2 + 52985^2 .

It is a cyclic number.

It is not a de Polignac number, because 276394989361 - 2²³ = 276386600753 is a prime.

It is not a weakly prime, because it can be changed into another prime (276394989391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138197494680 + 138197494681.

It is an arithmetic number, because the mean of its divisors is an integer number (138197494681).

Almost surely, 2^276394989361 is an apocalyptic number.

It is an amenable number.

276394989361 is a deficient number, since it is larger than the sum of its proper divisors (1).

276394989361 is an equidigital number, since it uses as much as digits as its factorization.

276394989361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105815808, while the sum is 67.

The spelling of 276394989361 in words is "two hundred seventy-six billion, three hundred ninety-four million, nine hundred eighty-nine thousand, three hundred sixty-one".