277196523421 has 2 divisors, whose sum is σ = 277196523422. Its totient is φ = 277196523420.

The previous prime is 277196523419. The next prime is 277196523463. The reversal of 277196523421 is 124325691772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170064687321 + 107131836100 = 412389^2 + 327310^2 .

It is a cyclic number.

It is not a de Polignac number, because 277196523421 - 2¹ = 277196523419 is a prime.

Together with 277196523419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (277196523491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138598261710 + 138598261711.

It is an arithmetic number, because the mean of its divisors is an integer number (138598261711).

Almost surely, 2^277196523421 is an apocalyptic number.

It is an amenable number.

277196523421 is a deficient number, since it is larger than the sum of its proper divisors (1).

277196523421 is an equidigital number, since it uses as much as digits as its factorization.

277196523421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The spelling of 277196523421 in words is "two hundred seventy-seven billion, one hundred ninety-six million, five hundred twenty-three thousand, four hundred twenty-one".