61568071 has 2 divisors, whose sum is σ = 61568072. Its totient is φ = 61568070.

The previous prime is 61568069. The next prime is 61568081. The reversal of 61568071 is 17086516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61568071 - 2¹ = 61568069 is a prime.

It is a super-2 number, since 2×61568071² = 7581254733322082, which contains 22 as substring.

Together with 61568069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61568011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30784035 + 30784036.

It is an arithmetic number, because the mean of its divisors is an integer number (30784036).

Almost surely, 2^61568071 is an apocalyptic number.

61568071 is a deficient number, since it is larger than the sum of its proper divisors (1).

61568071 is an equidigital number, since it uses as much as digits as its factorization.

61568071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 61568071 is about 7846.5324188459. The cubic root of 61568071 is about 394.8679171691.

It can be divided in two parts, 615 and 68071, that added together give a palindrome (68686).

The spelling of 61568071 in words is "sixty-one million, five hundred sixty-eight thousand, seventy-one".