61585791 has 8 divisors (see below), whose sum is σ = 82841520. Its totient is φ = 40693632.

The previous prime is 61585753. The next prime is 61585807. The reversal of 61585791 is 19758516.

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

It is not a de Polignac number, because 61585791 - 2¹⁰ = 61584767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61585691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90496 + ... + 91173.

It is an arithmetic number, because the mean of its divisors is an integer number (10355190).

Almost surely, 2^61585791 is an apocalyptic number.

61585791 is a deficient number, since it is larger than the sum of its proper divisors (21255729).

61585791 is a wasteful number, since it uses less digits than its factorization.

61585791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181785.

The product of its digits is 75600, while the sum is 42.

The square root of 61585791 is about 7847.6614988161. The cubic root of 61585791 is about 394.9057960470.

The spelling of 61585791 in words is "sixty-one million, five hundred eighty-five thousand, seven hundred ninety-one".