61318785 has 32 divisors (see below), whose sum is σ = 109320192. Its totient is φ = 29094080.

The previous prime is 61318783. The next prime is 61318787. The reversal of 61318785 is 58781316.

61318785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61318783) and next prime (61318787).

It is not a de Polignac number, because 61318785 - 2¹ = 61318783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61318781) 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 31 ways as a sum of consecutive naturals, for example, 3802 + ... + 11708.

It is an arithmetic number, because the mean of its divisors is an integer number (3416256).

Almost surely, 2^61318785 is an apocalyptic number.

It is an amenable number.

61318785 is a deficient number, since it is larger than the sum of its proper divisors (48001407).

61318785 is a wasteful number, since it uses less digits than its factorization.

61318785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7973.

The product of its digits is 40320, while the sum is 39.

The square root of 61318785 is about 7830.6312006121. The cubic root of 61318785 is about 394.3342628768.

The spelling of 61318785 in words is "sixty-one million, three hundred eighteen thousand, seven hundred eighty-five".