1606355543 has 4 divisors (see below), whose sum is σ = 1729921368. Its totient is φ = 1482789720.

The previous prime is 1606355539. The next prime is 1606355549. The reversal of 1606355543 is 3455536061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3455536061 = 19 ⋅181870319.

It is a cyclic number.

It is not a de Polignac number, because 1606355543 - 2² = 1606355539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1606355497 and 1606355506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606355549) 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, 61782893 + ... + 61782918.

It is an arithmetic number, because the mean of its divisors is an integer number (432480342).

Almost surely, 2^1606355543 is an apocalyptic number.

1606355543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1606355543 is a deficient number, since it is larger than the sum of its proper divisors (123565825).

1606355543 is a wasteful number, since it uses less digits than its factorization.

1606355543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123565824.

The product of its (nonzero) digits is 162000, while the sum is 38.

The square root of 1606355543 is about 40079.3655513657. The cubic root of 1606355543 is about 1171.1536926561.

The spelling of 1606355543 in words is "one billion, six hundred six million, three hundred fifty-five thousand, five hundred forty-three".