161680430 has 16 divisors (see below), whose sum is σ = 297793584. Its totient is φ = 63168000.

The previous prime is 161680427. The next prime is 161680457. The reversal of 161680430 is 34086161.

It is a super-2 number, since 2×161680430² = 52281122889969800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161680393 and 161680402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187571 + ... + 188430.

It is an arithmetic number, because the mean of its divisors is an integer number (18612099).

Almost surely, 2^161680430 is an apocalyptic number.

161680430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161680430 is a deficient number, since it is larger than the sum of its proper divisors (136113154).

161680430 is a wasteful number, since it uses less digits than its factorization.

161680430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376051.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 161680430 is about 12715.3619688942. The cubic root of 161680430 is about 544.7774868094. Note that the first 3 decimals are identical.

The spelling of 161680430 in words is "one hundred sixty-one million, six hundred eighty thousand, four hundred thirty".