8590415265821 has 2 divisors, whose sum is σ = 8590415265822. Its totient is φ = 8590415265820.

The previous prime is 8590415265739. The next prime is 8590415265823. The reversal of 8590415265821 is 1285625140958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6642032001796 + 1948383264025 = 2577214^2 + 1395845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8590415265821 is a prime.

Together with 8590415265823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8590415265823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4295207632910 + 4295207632911.

It is an arithmetic number, because the mean of its divisors is an integer number (4295207632911).

Almost surely, 2^{8590415265821} is an apocalyptic number.

It is an amenable number.

8590415265821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8590415265821 is an equidigital number, since it uses as much as digits as its factorization.

8590415265821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912000, while the sum is 56.

The spelling of 8590415265821 in words is "eight trillion, five hundred ninety billion, four hundred fifteen million, two hundred sixty-five thousand, eight hundred twenty-one".