61009559 has 8 divisors (see below), whose sum is σ = 67478880. Its totient is φ = 54794016.

The previous prime is 61009541. The next prime is 61009601. The reversal of 61009559 is 95590016.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61009559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61009159) 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, 62939 + ... + 63900.

It is an arithmetic number, because the mean of its divisors is an integer number (8434860).

Almost surely, 2^61009559 is an apocalyptic number.

61009559 is a deficient number, since it is larger than the sum of its proper divisors (6469321).

61009559 is a wasteful number, since it uses less digits than its factorization.

61009559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126889.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 61009559 is about 7810.8616042022. The cubic root of 61009559 is about 393.6702795185.

The spelling of 61009559 in words is "sixty-one million, nine thousand, five hundred fifty-nine".