1605160001591 has 2 divisors, whose sum is σ = 1605160001592. Its totient is φ = 1605160001590.

The previous prime is 1605160001587. The next prime is 1605160001597. The reversal of 1605160001591 is 1951000615061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1605160001591 - 2² = 1605160001587 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1605160001597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802580000795 + 802580000796.

It is an arithmetic number, because the mean of its divisors is an integer number (802580000796).

Almost surely, 2^{1605160001591} is an apocalyptic number.

1605160001591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605160001591 is an equidigital number, since it uses as much as digits as its factorization.

1605160001591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 35.

The spelling of 1605160001591 in words is "one trillion, six hundred five billion, one hundred sixty million, one thousand, five hundred ninety-one".