161769616 has 20 divisors (see below), whose sum is σ = 316662892. Its totient is φ = 80050176.

The previous prime is 161769613. The next prime is 161769617. The reversal of 161769616 is 616967161.

161769616 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 98089216 + 63680400 = 9904^2 + 7980^2 .

It is not an unprimeable number, because it can be changed into a prime (161769611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50565 + ... + 53668.

Almost surely, 2^161769616 is an apocalyptic number.

161769616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161769616 is a deficient number, since it is larger than the sum of its proper divisors (154893276).

161769616 is a wasteful number, since it uses less digits than its factorization.

161769616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104338 (or 104332 counting only the distinct ones).

The product of its digits is 81648, while the sum is 43.

The square root of 161769616 is about 12718.8685031334. The cubic root of 161769616 is about 544.8776382706.

The spelling of 161769616 in words is "one hundred sixty-one million, seven hundred sixty-nine thousand, six hundred sixteen".