61005659 has 12 divisors (see below), whose sum is σ = 72215808. Its totient is φ = 51192240.

The previous prime is 61005643. The next prime is 61005667. The reversal of 61005659 is 95650016.

It is not a de Polignac number, because 61005659 - 2⁴ = 61005643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61005629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17819 + ... + 20964.

It is an arithmetic number, because the mean of its divisors is an integer number (6017984).

Almost surely, 2^61005659 is an apocalyptic number.

61005659 is a deficient number, since it is larger than the sum of its proper divisors (11210149).

61005659 is a wasteful number, since it uses less digits than its factorization.

61005659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38818 (or 38807 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 61005659 is about 7810.6119478566. The cubic root of 61005659 is about 393.6618909598.

The spelling of 61005659 in words is "sixty-one million, five thousand, six hundred fifty-nine".