304640668613 has 2 divisors, whose sum is σ = 304640668614. Its totient is φ = 304640668612.

The previous prime is 304640668547. The next prime is 304640668621. The reversal of 304640668613 is 316866046403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259627954369 + 45012714244 = 509537^2 + 212162^2 .

It is a cyclic number.

It is not a de Polignac number, because 304640668613 - 2²² = 304636474309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304640668643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152320334306 + 152320334307.

It is an arithmetic number, because the mean of its divisors is an integer number (152320334307).

Almost surely, 2^304640668613 is an apocalyptic number.

It is an amenable number.

304640668613 is a deficient number, since it is larger than the sum of its proper divisors (1).

304640668613 is an equidigital number, since it uses as much as digits as its factorization.

304640668613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 47.

The spelling of 304640668613 in words is "three hundred four billion, six hundred forty million, six hundred sixty-eight thousand, six hundred thirteen".