61712065 has 8 divisors (see below), whose sum is σ = 74379240. Its totient is φ = 49153152.

The previous prime is 61712047. The next prime is 61712071. The reversal of 61712065 is 56021716.

It can be written as a sum of positive squares in 4 ways, for example, as 26142769 + 35569296 = 5113^2 + 5964^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 61712065 - 2¹⁵ = 61679297 is a prime.

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, 25804 + ... + 28093.

It is an arithmetic number, because the mean of its divisors is an integer number (9297405).

Almost surely, 2^61712065 is an apocalyptic number.

It is an amenable number.

61712065 is a deficient number, since it is larger than the sum of its proper divisors (12667175).

61712065 is a wasteful number, since it uses less digits than its factorization.

61712065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54131.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 61712065 is about 7855.7027056782. The cubic root of 61712065 is about 395.1755135196.

The spelling of 61712065 in words is "sixty-one million, seven hundred twelve thousand, sixty-five".