1610565616 has 40 divisors (see below), whose sum is σ = 3552165504. Its totient is φ = 700244160.

The previous prime is 1610565611. The next prime is 1610565641. The reversal of 1610565616 is 6165650161.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1610565611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194886 + ... + 202981.

Almost surely, 2^1610565616 is an apocalyptic number.

1610565616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1610565616 is an abundant number, since it is smaller than the sum of its proper divisors (1941599888).

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

1610565616 is a wasteful number, since it uses less digits than its factorization.

1610565616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397909 (or 397903 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1610565616 is about 40131.8528852083. The cubic root of 1610565616 is about 1172.1759531127.

The spelling of 1610565616 in words is "one billion, six hundred ten million, five hundred sixty-five thousand, six hundred sixteen".