161805046 has 16 divisors (see below), whose sum is σ = 272742624. Its totient is φ = 71432064.

The previous prime is 161805041. The next prime is 161805053. The reversal of 161805046 is 640508161.

It is a super-2 number, since 2×161805046² = 52361745822124232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161804999 and 161805017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161805041) 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, 134691 + ... + 135886.

It is an arithmetic number, because the mean of its divisors is an integer number (17046414).

Almost surely, 2^161805046 is an apocalyptic number.

161805046 is a deficient number, since it is larger than the sum of its proper divisors (110937578).

161805046 is a wasteful number, since it uses less digits than its factorization.

161805046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270615.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 161805046 is about 12720.2612394557. The cubic root of 161805046 is about 544.9174141898.

The spelling of 161805046 in words is "one hundred sixty-one million, eight hundred five thousand, forty-six".