161963570 has 16 divisors (see below), whose sum is σ = 291717720. Its totient is φ = 64744704.

The previous prime is 161963569. The next prime is 161963609. The reversal of 161963570 is 75369161.

It can be written as a sum of positive squares in 4 ways, for example, as 66569281 + 95394289 = 8159^2 + 9767^2 .

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, 15626 + ... + 23834.

Almost surely, 2^161963570 is an apocalyptic number.

161963570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161963570 is a deficient number, since it is larger than the sum of its proper divisors (129754150).

161963570 is a wasteful number, since it uses less digits than its factorization.

161963570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10189.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 161963570 is about 12726.4908753356. The cubic root of 161963570 is about 545.0953120065.

The spelling of 161963570 in words is "one hundred sixty-one million, nine hundred sixty-three thousand, five hundred seventy".