340544455333421 has 2 divisors, whose sum is σ = 340544455333422. Its totient is φ = 340544455333420.

The previous prime is 340544455333417. The next prime is 340544455333451. The reversal of 340544455333421 is 124333554445043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173633197230025 + 166911258103396 = 13176995^2 + 12919414^2 .

It is a cyclic number.

It is not a de Polignac number, because 340544455333421 - 2² = 340544455333417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 340544455333421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340544455333451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170272227666710 + 170272227666711.

It is an arithmetic number, because the mean of its divisors is an integer number (170272227666711).

Almost surely, 2^{340544455333421} is an apocalyptic number.

It is an amenable number.

340544455333421 is a deficient number, since it is larger than the sum of its proper divisors (1).

340544455333421 is an equidigital number, since it uses as much as digits as its factorization.

340544455333421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736000, while the sum is 50.

The spelling of 340544455333421 in words is "three hundred forty trillion, five hundred forty-four billion, four hundred fifty-five million, three hundred thirty-three thousand, four hundred twenty-one".