1606637613 has 32 divisors (see below), whose sum is σ = 2586562560. Its totient is φ = 867545280.

The previous prime is 1606637609. The next prime is 1606637621. The reversal of 1606637613 is 3167366061.

It is not a de Polignac number, because 1606637613 - 2² = 1606637609 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606637623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 558 + ... + 56688.

It is an arithmetic number, because the mean of its divisors is an integer number (80830080).

Almost surely, 2^1606637613 is an apocalyptic number.

It is an amenable number.

1606637613 is a deficient number, since it is larger than the sum of its proper divisors (979924947).

1606637613 is a wasteful number, since it uses less digits than its factorization.

1606637613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56217.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 1606637613 is about 40082.8842899310. The cubic root of 1606637613 is about 1171.2222387073. Note that the first 4 decimals are identical.

The spelling of 1606637613 in words is "one billion, six hundred six million, six hundred thirty-seven thousand, six hundred thirteen".