626958161 has 2 divisors, whose sum is σ = 626958162. Its totient is φ = 626958160.

The previous prime is 626958151. The next prime is 626958197. The reversal of 626958161 is 161859626.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 602997136 + 23961025 = 24556^2 + 4895^2 .

It is a cyclic number.

It is not a de Polignac number, because 626958161 - 2¹⁸ = 626696017 is a prime.

It is not a weakly prime, because it can be changed into another prime (626958121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313479080 + 313479081.

It is an arithmetic number, because the mean of its divisors is an integer number (313479081).

Almost surely, 2^626958161 is an apocalyptic number.

It is an amenable number.

626958161 is a deficient number, since it is larger than the sum of its proper divisors (1).

626958161 is an equidigital number, since it uses as much as digits as its factorization.

626958161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 626958161 is about 25039.1325928036. The cubic root of 626958161 is about 855.8799513024.

The spelling of 626958161 in words is "six hundred twenty-six million, nine hundred fifty-eight thousand, one hundred sixty-one".