61600561 has 8 divisors (see below), whose sum is σ = 67320000. Its totient is φ = 55901040.

The previous prime is 61600547. The next prime is 61600579. The reversal of 61600561 is 16500616.

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 61600561 - 2⁷ = 61600433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61600501) 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, 1915 + ... + 11263.

It is an arithmetic number, because the mean of its divisors is an integer number (8415000).

Almost surely, 2^61600561 is an apocalyptic number.

It is an amenable number.

61600561 is a deficient number, since it is larger than the sum of its proper divisors (5719439).

61600561 is a wasteful number, since it uses less digits than its factorization.

61600561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9959.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 61600561 is about 7848.6024870674. The cubic root of 61600561 is about 394.9373633522.

The spelling of 61600561 in words is "sixty-one million, six hundred thousand, five hundred sixty-one".