245553426161 has 2 divisors, whose sum is σ = 245553426162. Its totient is φ = 245553426160.

The previous prime is 245553426059. The next prime is 245553426169. The reversal of 245553426161 is 161624355542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229363408561 + 16190017600 = 478919^2 + 127240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245553426161 is a prime.

It is not a weakly prime, because it can be changed into another prime (245553426169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122776713080 + 122776713081.

It is an arithmetic number, because the mean of its divisors is an integer number (122776713081).

Almost surely, 2^245553426161 is an apocalyptic number.

It is an amenable number.

245553426161 is a deficient number, since it is larger than the sum of its proper divisors (1).

245553426161 is an equidigital number, since it uses as much as digits as its factorization.

245553426161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864000, while the sum is 44.

The spelling of 245553426161 in words is "two hundred forty-five billion, five hundred fifty-three million, four hundred twenty-six thousand, one hundred sixty-one".