1611355225429 has 2 divisors, whose sum is σ = 1611355225430. Its totient is φ = 1611355225428.

The previous prime is 1611355225423. The next prime is 1611355225507. The reversal of 1611355225429 is 9245225531161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1256528902500 + 354826322929 = 1120950^2 + 595673^2 .

It is a cyclic number.

It is not a de Polignac number, because 1611355225429 - 2¹¹ = 1611355223381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1611355225423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805677612714 + 805677612715.

It is an arithmetic number, because the mean of its divisors is an integer number (805677612715).

Almost surely, 2^{1611355225429} is an apocalyptic number.

It is an amenable number.

1611355225429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611355225429 is an equidigital number, since it uses as much as digits as its factorization.

1611355225429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648000, while the sum is 46.

The spelling of 1611355225429 in words is "one trillion, six hundred eleven billion, three hundred fifty-five million, two hundred twenty-five thousand, four hundred twenty-nine".