61606188 has 72 divisors (see below), whose sum is σ = 179262720. Its totient is φ = 17474400.

The previous prime is 61606163. The next prime is 61606201. The reversal of 61606188 is 88160616.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37243 + ... + 38861.

It is an arithmetic number, because the mean of its divisors is an integer number (2489760).

Almost surely, 2^61606188 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61606188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89631360).

61606188 is an abundant number, since it is smaller than the sum of its proper divisors (117656532).

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

61606188 is a wasteful number, since it uses less digits than its factorization.

61606188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1787 (or 1782 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 61606188 is about 7848.9609503424. The cubic root of 61606188 is about 394.9493883773.

The spelling of 61606188 in words is "sixty-one million, six hundred six thousand, one hundred eighty-eight".