1606256343571 has 4 divisors (see below), whose sum is σ = 1752279647544. Its totient is φ = 1460233039600.

The previous prime is 1606256343563. The next prime is 1606256343701. The reversal of 1606256343571 is 1753436526061.

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 1606256343571 - 2³ = 1606256343563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1606256343271) 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, 73011651970 + ... + 73011651991.

It is an arithmetic number, because the mean of its divisors is an integer number (438069911886).

Almost surely, 2^{1606256343571} is an apocalyptic number.

1606256343571 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1606256343571 is a deficient number, since it is larger than the sum of its proper divisors (146023303973).

1606256343571 is a wasteful number, since it uses less digits than its factorization.

1606256343571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146023303972.

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 1606256343571 in words is "one trillion, six hundred six billion, two hundred fifty-six million, three hundred forty-three thousand, five hundred seventy-one".