306640061953 has 2 divisors, whose sum is σ = 306640061954. Its totient is φ = 306640061952.

The previous prime is 306640061857. The next prime is 306640061977. The reversal of 306640061953 is 359160046603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 305933990769 + 706071184 = 553113^2 + 26572^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-306640061953 is a prime.

It is not a weakly prime, because it can be changed into another prime (306640061983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153320030976 + 153320030977.

It is an arithmetic number, because the mean of its divisors is an integer number (153320030977).

Almost surely, 2^306640061953 is an apocalyptic number.

It is an amenable number.

306640061953 is a deficient number, since it is larger than the sum of its proper divisors (1).

306640061953 is an equidigital number, since it uses as much as digits as its factorization.

306640061953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 43.

The spelling of 306640061953 in words is "three hundred six billion, six hundred forty million, sixty-one thousand, nine hundred fifty-three".