161636414 has 4 divisors (see below), whose sum is σ = 242454624. Its totient is φ = 80818206.

The previous prime is 161636413. The next prime is 161636467. The reversal of 161636414 is 414636161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 414636161 = 79 ⋅5248559.

It is a super-2 number, since 2×161636414² = 52252660661558792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161636411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40409102 + ... + 40409105.

It is an arithmetic number, because the mean of its divisors is an integer number (60613656).

Almost surely, 2^161636414 is an apocalyptic number.

161636414 is a deficient number, since it is larger than the sum of its proper divisors (80818210).

161636414 is an equidigital number, since it uses as much as digits as its factorization.

161636414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80818209.

The product of its digits is 10368, while the sum is 32.

The square root of 161636414 is about 12713.6310312987. The cubic root of 161636414 is about 544.7280454470.

The spelling of 161636414 in words is "one hundred sixty-one million, six hundred thirty-six thousand, four hundred fourteen".