305052618239921 has 2 divisors, whose sum is σ = 305052618239922. Its totient is φ = 305052618239920.

The previous prime is 305052618239911. The next prime is 305052618240023. The reversal of 305052618239921 is 129932816250503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246671022823696 + 58381595416225 = 15705764^2 + 7640785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305052618239921 is a prime.

It is not a weakly prime, because it can be changed into another prime (305052618239911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152526309119960 + 152526309119961.

It is an arithmetic number, because the mean of its divisors is an integer number (152526309119961).

Almost surely, 2^{305052618239921} is an apocalyptic number.

It is an amenable number.

305052618239921 is a deficient number, since it is larger than the sum of its proper divisors (1).

305052618239921 is an equidigital number, since it uses as much as digits as its factorization.

305052618239921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6998400, while the sum is 56.

The spelling of 305052618239921 in words is "three hundred five trillion, fifty-two billion, six hundred eighteen million, two hundred thirty-nine thousand, nine hundred twenty-one".