1606637816 has 32 divisors (see below), whose sum is σ = 3561516000. Its totient is φ = 664814976.

The previous prime is 1606637803. The next prime is 1606637821. The reversal of 1606637816 is 6187366061.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493031 + ... + 496278.

It is an arithmetic number, because the mean of its divisors is an integer number (111297375).

Almost surely, 2^1606637816 is an apocalyptic number.

It is an amenable number.

1606637816 is an abundant number, since it is smaller than the sum of its proper divisors (1954878184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1606637816 is a wasteful number, since it uses less digits than its factorization.

1606637816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989351 (or 989347 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 1606637816 is about 40082.8868221839. The cubic root of 1606637816 is about 1171.2222880356. Note that the first 4 decimals are identical.

The spelling of 1606637816 in words is "one billion, six hundred six million, six hundred thirty-seven thousand, eight hundred sixteen".