61716817 has 6 divisors (see below), whose sum is σ = 65561078. Its totient is φ = 58086144.

The previous prime is 61716799. The next prime is 61716827. The reversal of 61716817 is 71861716.

It can be written as a sum of positive squares in 3 ways, for example, as 19219456 + 42497361 = 4384^2 + 6519^2 .

It is not a de Polignac number, because 61716817 - 2¹⁹ = 61192529 is a prime.

It is a super-2 number, since 2×61716817² = 7617931001222978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61716827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106488 + ... + 107065.

Almost surely, 2^61716817 is an apocalyptic number.

It is an amenable number.

61716817 is a deficient number, since it is larger than the sum of its proper divisors (3844261).

61716817 is a wasteful number, since it uses less digits than its factorization.

61716817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213587 (or 213570 counting only the distinct ones).

The product of its digits is 14112, while the sum is 37.

The square root of 61716817 is about 7856.0051552936. The cubic root of 61716817 is about 395.1856564624.

The spelling of 61716817 in words is "sixty-one million, seven hundred sixteen thousand, eight hundred seventeen".