161564046 has 32 divisors (see below), whose sum is σ = 382026240. Its totient is φ = 44569056.

The previous prime is 161564021. The next prime is 161564047. The reversal of 161564046 is 640465161.

It is a happy number.

It is a super-2 number, since 2×161564046² = 52205881919780232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161563998 and 161564016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161564047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65106 + ... + 67541.

It is an arithmetic number, because the mean of its divisors is an integer number (11938320).

Almost surely, 2^161564046 is an apocalyptic number.

161564046 is an abundant number, since it is smaller than the sum of its proper divisors (220462194).

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

161564046 is a wasteful number, since it uses less digits than its factorization.

161564046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132688.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 161564046 is about 12710.7846335307. The cubic root of 161564046 is about 544.6467379354.

It can be divided in two parts, 16156 and 4046, that added together give a palindrome (20202).

The spelling of 161564046 in words is "one hundred sixty-one million, five hundred sixty-four thousand, forty-six".