161561362 has 8 divisors (see below), whose sum is σ = 243829296. Its totient is φ = 80284932.

The previous prime is 161561359. The next prime is 161561369. The reversal of 161561362 is 263165161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×161561362² = 52204147382590088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161561369) 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, 247468 + ... + 248119.

It is an arithmetic number, because the mean of its divisors is an integer number (30478662).

Almost surely, 2^161561362 is an apocalyptic number.

161561362 is a deficient number, since it is larger than the sum of its proper divisors (82267934).

161561362 is a wasteful number, since it uses less digits than its factorization.

161561362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495752.

The product of its digits is 6480, while the sum is 31.

The square root of 161561362 is about 12710.6790534574. The cubic root of 161561362 is about 544.6437219179.

The spelling of 161561362 in words is "one hundred sixty-one million, five hundred sixty-one thousand, three hundred sixty-two".