1606425005 has 4 divisors (see below), whose sum is σ = 1927710012. Its totient is φ = 1285140000.

The previous prime is 1606424993. The next prime is 1606425061. The reversal of 1606425005 is 5005246061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5005246061 = 59 ⋅84834679.

It can be written as a sum of positive squares in 2 ways, for example, as 255936004 + 1350489001 = 15998^2 + 36749^2 .

It is not a de Polignac number, because 1606425005 - 2¹⁸ = 1606162861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160642496 + ... + 160642505.

It is an arithmetic number, because the mean of its divisors is an integer number (481927503).

Almost surely, 2^1606425005 is an apocalyptic number.

It is an amenable number.

1606425005 is a deficient number, since it is larger than the sum of its proper divisors (321285007).

1606425005 is an equidigital number, since it uses as much as digits as its factorization.

1606425005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321285006.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1606425005 is about 40080.2320976314. The cubic root of 1606425005 is about 1171.1705734157.

The spelling of 1606425005 in words is "one billion, six hundred six million, four hundred twenty-five thousand, five".