161510616 has 24 divisors (see below), whose sum is σ = 437424780. Its totient is φ = 53836848.

The previous prime is 161510567. The next prime is 161510627. The reversal of 161510616 is 616015161.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 161510616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1121530 + ... + 1121673.

Almost surely, 2^161510616 is an apocalyptic number.

It is an amenable number.

161510616 is an abundant number, since it is smaller than the sum of its proper divisors (275914164).

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

161510616 is a wasteful number, since it uses less digits than its factorization.

161510616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243215 (or 2243208 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 161510616 is about 12708.6827012087. The cubic root of 161510616 is about 544.5866922251.

Adding to 161510616 its reverse (616015161), we get a palindrome (777525777).

The spelling of 161510616 in words is "one hundred sixty-one million, five hundred ten thousand, six hundred sixteen".