161653526 has 16 divisors (see below), whose sum is σ = 244200528. Its totient is φ = 80256000.

The previous prime is 161653523. The next prime is 161653537. The reversal of 161653526 is 625356161.

It is a super-2 number, since 2×161653526² = 52263724936465352, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161653523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282821 + ... + 283391.

It is an arithmetic number, because the mean of its divisors is an integer number (15262533).

Almost surely, 2^161653526 is an apocalyptic number.

161653526 is a deficient number, since it is larger than the sum of its proper divisors (82547002).

161653526 is a wasteful number, since it uses less digits than its factorization.

161653526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327.

The product of its digits is 32400, while the sum is 35.

The square root of 161653526 is about 12714.3039919612. The cubic root of 161653526 is about 544.7472677191.

It can be divided in two parts, 16165 and 3526, that added together give a palindrome (19691).

The spelling of 161653526 in words is "one hundred sixty-one million, six hundred fifty-three thousand, five hundred twenty-six".