61809126 has 16 divisors (see below), whose sum is σ = 125184000. Its totient is φ = 20342088.

The previous prime is 61809113. The next prime is 61809151. The reversal of 61809126 is 62190816.

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, 64726 + ... + 65673.

It is an arithmetic number, because the mean of its divisors is an integer number (7824000).

Almost surely, 2^61809126 is an apocalyptic number.

61809126 is an abundant number, since it is smaller than the sum of its proper divisors (63374874).

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

61809126 is a wasteful number, since it uses less digits than its factorization.

61809126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130483.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 61809126 is about 7861.8780199136. The cubic root of 61809126 is about 395.3825829107.

The spelling of 61809126 in words is "sixty-one million, eight hundred nine thousand, one hundred twenty-six".