61085791 has 8 divisors (see below), whose sum is σ = 65852864. Its totient is φ = 56328480.

The previous prime is 61085789. The next prime is 61085797. The reversal of 61085791 is 19758016.

61085791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 61085791 - 2¹ = 61085789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61085791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61085797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15481 + ... + 19021.

It is an arithmetic number, because the mean of its divisors is an integer number (8231608).

Almost surely, 2^61085791 is an apocalyptic number.

61085791 is a deficient number, since it is larger than the sum of its proper divisors (4767073).

61085791 is a wasteful number, since it uses less digits than its factorization.

61085791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4881.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 61085791 is about 7815.7399521734. The cubic root of 61085791 is about 393.8341761414.

The spelling of 61085791 in words is "sixty-one million, eighty-five thousand, seven hundred ninety-one".