1601457442909 has 2 divisors, whose sum is σ = 1601457442910. Its totient is φ = 1601457442908.

The previous prime is 1601457442829. The next prime is 1601457442931. The reversal of 1601457442909 is 9092447541061.

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., 1547921664025 + 53535778884 = 1244155^2 + 231378^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601457442909 - 2⁹ = 1601457442397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1601457442939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800728721454 + 800728721455.

It is an arithmetic number, because the mean of its divisors is an integer number (800728721455).

Almost surely, 2^{1601457442909} is an apocalyptic number.

It is an amenable number.

1601457442909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601457442909 is an equidigital number, since it uses as much as digits as its factorization.

1601457442909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 1601457442909 in words is "one trillion, six hundred one billion, four hundred fifty-seven million, four hundred forty-two thousand, nine hundred nine".