245864821633 has 2 divisors, whose sum is σ = 245864821634. Its totient is φ = 245864821632.

The previous prime is 245864821627. The next prime is 245864821637. The reversal of 245864821633 is 336128468542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125849691009 + 120015130624 = 354753^2 + 346432^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245864821633 is a prime.

It is not a weakly prime, because it can be changed into another prime (245864821637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122932410816 + 122932410817.

It is an arithmetic number, because the mean of its divisors is an integer number (122932410817).

Almost surely, 2^245864821633 is an apocalyptic number.

It is an amenable number.

245864821633 is a deficient number, since it is larger than the sum of its proper divisors (1).

245864821633 is an equidigital number, since it uses as much as digits as its factorization.

245864821633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6635520, while the sum is 52.

The spelling of 245864821633 in words is "two hundred forty-five billion, eight hundred sixty-four million, eight hundred twenty-one thousand, six hundred thirty-three".