61641593 has 8 divisors (see below), whose sum is σ = 68177928. Its totient is φ = 55361664.

The previous prime is 61641589. The next prime is 61641611. The reversal of 61641593 is 39514616.

It can be written as a sum of positive squares in 4 ways, for example, as 17909824 + 43731769 = 4232^2 + 6613^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 61641593 - 2² = 61641589 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61641553) 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, 63596 + ... + 64557.

It is an arithmetic number, because the mean of its divisors is an integer number (8522241).

Almost surely, 2^61641593 is an apocalyptic number.

It is an amenable number.

61641593 is a deficient number, since it is larger than the sum of its proper divisors (6536335).

61641593 is a wasteful number, since it uses less digits than its factorization.

61641593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128203.

The product of its digits is 19440, while the sum is 35.

The square root of 61641593 is about 7851.2160204646. The cubic root of 61641593 is about 395.0250328631.

The spelling of 61641593 in words is "sixty-one million, six hundred forty-one thousand, five hundred ninety-three".