1625162708989 has 2 divisors, whose sum is σ = 1625162708990. Its totient is φ = 1625162708988.

The previous prime is 1625162708959. The next prime is 1625162709007. The reversal of 1625162708989 is 9898072615261.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1453483416025 + 171679292964 = 1205605^2 + 414342^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625162708989 - 2¹¹ = 1625162706941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1625162708989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625162708959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812581354494 + 812581354495.

It is an arithmetic number, because the mean of its divisors is an integer number (812581354495).

Almost surely, 2^{1625162708989} is an apocalyptic number.

It is an amenable number.

1625162708989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625162708989 is an equidigital number, since it uses as much as digits as its factorization.

1625162708989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26127360, while the sum is 64.

The spelling of 1625162708989 in words is "one trillion, six hundred twenty-five billion, one hundred sixty-two million, seven hundred eight thousand, nine hundred eighty-nine".