161575716 has 12 divisors (see below), whose sum is σ = 377010032. Its totient is φ = 53858568.

The previous prime is 161575709. The next prime is 161575717. The reversal of 161575716 is 617575161.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×161575716² = 52213424001825312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161575717) 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, 6732310 + ... + 6732333.

Almost surely, 2^161575716 is an apocalyptic number.

It is an amenable number.

161575716 is an abundant number, since it is smaller than the sum of its proper divisors (215434316).

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

161575716 is a wasteful number, since it uses less digits than its factorization.

161575716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13464650 (or 13464648 counting only the distinct ones).

The product of its digits is 44100, while the sum is 39.

The square root of 161575716 is about 12711.2436842348. The cubic root of 161575716 is about 544.6598511549.

The spelling of 161575716 in words is "one hundred sixty-one million, five hundred seventy-five thousand, seven hundred sixteen".