1626012161 has 2 divisors, whose sum is σ = 1626012162. Its totient is φ = 1626012160.

The previous prime is 1626012127. The next prime is 1626012181. The reversal of 1626012161 is 1612106261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 957531136 + 668481025 = 30944^2 + 25855^2 .

It is a cyclic number.

It is not a de Polignac number, because 1626012161 - 2¹⁰ = 1626011137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1626012161.

It is not a weakly prime, because it can be changed into another prime (1626012181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 813006080 + 813006081.

It is an arithmetic number, because the mean of its divisors is an integer number (813006081).

Almost surely, 2^1626012161 is an apocalyptic number.

It is an amenable number.

1626012161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1626012161 is an equidigital number, since it uses as much as digits as its factorization.

1626012161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1626012161 is about 40323.8410992802. The cubic root of 1626012161 is about 1175.9113885078.

The spelling of 1626012161 in words is "one billion, six hundred twenty-six million, twelve thousand, one hundred sixty-one".