61185563 has 8 divisors (see below), whose sum is σ = 63950880. Its totient is φ = 58464000.

The previous prime is 61185557. The next prime is 61185577. The reversal of 61185563 is 36558116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61185563 - 2⁴ = 61185547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61185583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8063 + ... + 13688.

It is an arithmetic number, because the mean of its divisors is an integer number (7993860).

Almost surely, 2^61185563 is an apocalyptic number.

61185563 is a deficient number, since it is larger than the sum of its proper divisors (2765317).

61185563 is a wasteful number, since it uses less digits than its factorization.

61185563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21877.

The product of its digits is 21600, while the sum is 35.

The square root of 61185563 is about 7822.1201090242. The cubic root of 61185563 is about 394.0484772049.

The spelling of 61185563 in words is "sixty-one million, one hundred eighty-five thousand, five hundred sixty-three".