6455522921 has 2 divisors, whose sum is σ = 6455522922. Its totient is φ = 6455522920.

The previous prime is 6455522891. The next prime is 6455522923. The reversal of 6455522921 is 1292255546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6442309696 + 13213225 = 80264^2 + 3635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6455522921 is a prime.

Together with 6455522923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6455522923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3227761460 + 3227761461.

It is an arithmetic number, because the mean of its divisors is an integer number (3227761461).

Almost surely, 2^6455522921 is an apocalyptic number.

It is an amenable number.

6455522921 is a deficient number, since it is larger than the sum of its proper divisors (1).

6455522921 is an equidigital number, since it uses as much as digits as its factorization.

6455522921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 41.

The square root of 6455522921 is about 80346.2688679443. The cubic root of 6455522921 is about 1861.9891350615.

The spelling of 6455522921 in words is "six billion, four hundred fifty-five million, five hundred twenty-two thousand, nine hundred twenty-one".