161065827 has 20 divisors (see below), whose sum is σ = 259114240. Its totient is φ = 99116784.

The previous prime is 161065823. The next prime is 161065841. The reversal of 161065827 is 728560161.

It is not a de Polignac number, because 161065827 - 2² = 161065823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161065791 and 161065800.

It is not an unprimeable number, because it can be changed into a prime (161065823) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 75427 + ... + 77532.

It is an arithmetic number, because the mean of its divisors is an integer number (12955712).

Almost surely, 2^161065827 is an apocalyptic number.

161065827 is a deficient number, since it is larger than the sum of its proper divisors (98048413).

161065827 is a wasteful number, since it uses less digits than its factorization.

161065827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152984 (or 152975 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 161065827 is about 12691.1712225468. The cubic root of 161065827 is about 544.0863146543.

The spelling of 161065827 in words is "one hundred sixty-one million, sixty-five thousand, eight hundred twenty-seven".