61169490 has 48 divisors (see below), whose sum is σ = 159778008. Its totient is φ = 16236288.

The previous prime is 61169467. The next prime is 61169543. The reversal of 61169490 is 9496116.

61169490 is a `hidden beast` number, since 6 + 1 + 169 + 490 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 57471561 + 3697929 = 7581^2 + 1923^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19512 + ... + 22428.

Almost surely, 2^61169490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61169490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79889004).

61169490 is an abundant number, since it is smaller than the sum of its proper divisors (98608518).

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

61169490 is a wasteful number, since it uses less digits than its factorization.

61169490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163 (or 3160 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 61169490 is about 7821.0926346643. The cubic root of 61169490 is about 394.0139696319.

The spelling of 61169490 in words is "sixty-one million, one hundred sixty-nine thousand, four hundred ninety".