161804526 has 16 divisors (see below), whose sum is σ = 348502224. Its totient is φ = 49785984.

The previous prime is 161804507. The next prime is 161804611. The reversal of 161804526 is 625408161.

It is a super-3 number, since 3×161804526³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

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, 1037131 + ... + 1037286.

It is an arithmetic number, because the mean of its divisors is an integer number (21781389).

Almost surely, 2^161804526 is an apocalyptic number.

161804526 is an abundant number, since it is smaller than the sum of its proper divisors (186697698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161804526 is a wasteful number, since it uses less digits than its factorization.

161804526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074435.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 161804526 is about 12720.2407996075. The cubic root of 161804526 is about 544.9168304475.

It can be divided in two parts, 16180 and 4526, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 161804526 in words is "one hundred sixty-one million, eight hundred four thousand, five hundred twenty-six".