161601862244 has 12 divisors (see below), whose sum is σ = 284071436544. Its totient is φ = 80438594664.

The previous prime is 161601862241. The next prime is 161601862271. The reversal of 161601862244 is 442268106161.

It is a super-2 number, since 2×161601862244² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (161601862241) 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, 90583112 + ... + 90584895.

It is an arithmetic number, because the mean of its divisors is an integer number (23672619712).

Almost surely, 2^161601862244 is an apocalyptic number.

It is an amenable number.

161601862244 is a deficient number, since it is larger than the sum of its proper divisors (122469574300).

161601862244 is a wasteful number, since it uses less digits than its factorization.

161601862244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181168234 (or 181168232 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 161601862244 in words is "one hundred sixty-one billion, six hundred one million, eight hundred sixty-two thousand, two hundred forty-four".