161856026 has 4 divisors (see below), whose sum is σ = 242784042. Its totient is φ = 80928012.

The previous prime is 161856007. The next prime is 161856029. The reversal of 161856026 is 620658161.

It is a happy number.

161856026 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 107848225 + 54007801 = 10385^2 + 7349^2 .

It is not an unprimeable number, because it can be changed into a prime (161856029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40464005 + ... + 40464008.

Almost surely, 2^161856026 is an apocalyptic number.

161856026 is a deficient number, since it is larger than the sum of its proper divisors (80928016).

161856026 is an equidigital number, since it uses as much as digits as its factorization.

161856026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80928015.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 161856026 is about 12722.2649713013. The cubic root of 161856026 is about 544.9746373182.

The spelling of 161856026 in words is "one hundred sixty-one million, eight hundred fifty-six thousand, twenty-six".