61316565 has 8 divisors (see below), whose sum is σ = 98106528. Its totient is φ = 32702160.

The previous prime is 61316557. The next prime is 61316573. The reversal of 61316565 is 56561316.

It is an interprime number because it is at equal distance from previous prime (61316557) and next prime (61316573).

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

It is not a de Polignac number, because 61316565 - 2³ = 61316557 is a prime.

It is a super-3 number, since 3×61316565³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2043871 + ... + 2043900.

It is an arithmetic number, because the mean of its divisors is an integer number (12263316).

Almost surely, 2^61316565 is an apocalyptic number.

It is an amenable number.

61316565 is a deficient number, since it is larger than the sum of its proper divisors (36789963).

61316565 is a wasteful number, since it uses less digits than its factorization.

61316565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4087779.

The product of its digits is 16200, while the sum is 33.

The square root of 61316565 is about 7830.4894483040. The cubic root of 61316565 is about 394.3295039619.

The spelling of 61316565 in words is "sixty-one million, three hundred sixteen thousand, five hundred sixty-five".