1612123154309 has 2 divisors, whose sum is σ = 1612123154310. Its totient is φ = 1612123154308.

The previous prime is 1612123154303. The next prime is 1612123154359. The reversal of 1612123154309 is 9034513212161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1399851021409 + 212272132900 = 1183153^2 + 460730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612123154309 - 2¹² = 1612123150213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1612123154303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806061577154 + 806061577155.

It is an arithmetic number, because the mean of its divisors is an integer number (806061577155).

Almost surely, 2^{1612123154309} is an apocalyptic number.

It is an amenable number.

1612123154309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612123154309 is an equidigital number, since it uses as much as digits as its factorization.

1612123154309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 1612123154309 in words is "one trillion, six hundred twelve billion, one hundred twenty-three million, one hundred fifty-four thousand, three hundred nine".