8136521245441 has 2 divisors, whose sum is σ = 8136521245442. Its totient is φ = 8136521245440.

The previous prime is 8136521245421. The next prime is 8136521245471. The reversal of 8136521245441 is 1445421256318.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6672384945216 + 1464136300225 = 2583096^2 + 1210015^2 .

It is a cyclic number.

It is not a de Polignac number, because 8136521245441 - 2²⁵ = 8136487691009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8136521245391 and 8136521245400.

It is not a weakly prime, because it can be changed into another prime (8136521245421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4068260622720 + 4068260622721.

It is an arithmetic number, because the mean of its divisors is an integer number (4068260622721).

Almost surely, 2^{8136521245441} is an apocalyptic number.

It is an amenable number.

8136521245441 is a deficient number, since it is larger than the sum of its proper divisors (1).

8136521245441 is an equidigital number, since it uses as much as digits as its factorization.

8136521245441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 921600, while the sum is 46.

The spelling of 8136521245441 in words is "eight trillion, one hundred thirty-six billion, five hundred twenty-one million, two hundred forty-five thousand, four hundred forty-one".