1605425713571 has 4 divisors (see below), whose sum is σ = 1610904982512. Its totient is φ = 1599946444632.

The previous prime is 1605425713559. The next prime is 1605425713597. The reversal of 1605425713571 is 1753175245061.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1605425713571 - 2³⁴ = 1588245844387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1605425713531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2739634031 + ... + 2739634616.

It is an arithmetic number, because the mean of its divisors is an integer number (402726245628).

Almost surely, 2^{1605425713571} is an apocalyptic number.

1605425713571 is a deficient number, since it is larger than the sum of its proper divisors (5479268941).

1605425713571 is an equidigital number, since it uses as much as digits as its factorization.

1605425713571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5479268940.

The product of its (nonzero) digits is 882000, while the sum is 47.

The spelling of 1605425713571 in words is "one trillion, six hundred five billion, four hundred twenty-five million, seven hundred thirteen thousand, five hundred seventy-one".