61318265 has 8 divisors (see below), whose sum is σ = 73818888. Its totient is φ = 48896640.

The previous prime is 61318249. The next prime is 61318289. The reversal of 61318265 is 56281316.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2166784 + 59151481 = 1472^2 + 7691^2 .

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

It is not a de Polignac number, because 61318265 - 2⁴ = 61318249 is a prime.

It is a super-2 number, since 2×61318265² = 7519859245220450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18026 + ... + 21155.

It is an arithmetic number, because the mean of its divisors is an integer number (9227361).

Almost surely, 2^61318265 is an apocalyptic number.

It is an amenable number.

61318265 is a deficient number, since it is larger than the sum of its proper divisors (12500623).

61318265 is a wasteful number, since it uses less digits than its factorization.

61318265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39499.

The product of its digits is 8640, while the sum is 32.

The square root of 61318265 is about 7830.5979975989. The cubic root of 61318265 is about 394.3331481863. Note that the first 3 decimals are identical.

The spelling of 61318265 in words is "sixty-one million, three hundred eighteen thousand, two hundred sixty-five".