61316685 has 24 divisors (see below), whose sum is σ = 106530840. Its totient is φ = 32625792.

The previous prime is 61316681. The next prime is 61316687. The reversal of 61316685 is 58661316.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1687401 + 59629284 = 1299^2 + 7722^2 .

It is not a de Polignac number, because 61316685 - 2² = 61316681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61316681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21567 + ... + 24243.

It is an arithmetic number, because the mean of its divisors is an integer number (4438785).

Almost surely, 2^61316685 is an apocalyptic number.

It is an amenable number.

61316685 is a deficient number, since it is larger than the sum of its proper divisors (45214155).

61316685 is a wasteful number, since it uses less digits than its factorization.

61316685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3197 (or 3194 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 61316685 is about 7830.4971106565. The cubic root of 61316685 is about 394.3297612035.

It can be divided in two parts, 61316 and 685, that added together give a square (62001 = 249²).

The spelling of 61316685 in words is "sixty-one million, three hundred sixteen thousand, six hundred eighty-five".