8644417340381 has 2 divisors, whose sum is σ = 8644417340382. Its totient is φ = 8644417340380.

The previous prime is 8644417340369. The next prime is 8644417340459. The reversal of 8644417340381 is 1830437144468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6873095912281 + 1771321428100 = 2621659^2 + 1330910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8644417340381 is a prime.

It is a super-2 number, since 2×8644417340381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8644417310381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4322208670190 + 4322208670191.

It is an arithmetic number, because the mean of its divisors is an integer number (4322208670191).

Almost surely, 2^{8644417340381} is an apocalyptic number.

It is an amenable number.

8644417340381 is a deficient number, since it is larger than the sum of its proper divisors (1).

8644417340381 is an equidigital number, since it uses as much as digits as its factorization.

8644417340381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6193152, while the sum is 53.

The spelling of 8644417340381 in words is "eight trillion, six hundred forty-four billion, four hundred seventeen million, three hundred forty thousand, three hundred eighty-one".