61489165 has 4 divisors (see below), whose sum is σ = 73787004. Its totient is φ = 49191328.

The previous prime is 61489157. The next prime is 61489177. The reversal of 61489165 is 56198416.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41615401 + 19873764 = 6451^2 + 4458^2 .

It is a cyclic number.

It is not a de Polignac number, because 61489165 - 2³ = 61489157 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6148912 + ... + 6148921.

It is an arithmetic number, because the mean of its divisors is an integer number (18446751).

Almost surely, 2^61489165 is an apocalyptic number.

It is an amenable number.

61489165 is a deficient number, since it is larger than the sum of its proper divisors (12297839).

61489165 is a wasteful number, since it uses less digits than its factorization.

61489165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12297838.

The product of its digits is 51840, while the sum is 40.

The square root of 61489165 is about 7841.5027258811. The cubic root of 61489165 is about 394.6991567095.

The spelling of 61489165 in words is "sixty-one million, four hundred eighty-nine thousand, one hundred sixty-five".