161826794 has 4 divisors (see below), whose sum is σ = 242740194. Its totient is φ = 80913396.

The previous prime is 161826779. The next prime is 161826799. The reversal of 161826794 is 497628161.

161826794 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 497628161 = 23 ⋅21636007.

It can be written as a sum of positive squares in only one way, i.e., 159087769 + 2739025 = 12613^2 + 1655^2 .

It is a super-2 number, since 2×161826794² = 52375822512636872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161826799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40456697 + ... + 40456700.

Almost surely, 2^161826794 is an apocalyptic number.

161826794 is a deficient number, since it is larger than the sum of its proper divisors (80913400).

161826794 is an equidigital number, since it uses as much as digits as its factorization.

161826794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80913399.

The product of its digits is 145152, while the sum is 44.

The square root of 161826794 is about 12721.1160673897. The cubic root of 161826794 is about 544.9418269699.

The spelling of 161826794 in words is "one hundred sixty-one million, eight hundred twenty-six thousand, seven hundred ninety-four".