61716745 has 4 divisors (see below), whose sum is σ = 74060100. Its totient is φ = 49373392.

The previous prime is 61716737. The next prime is 61716761. The reversal of 61716745 is 54761716.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22240656 + 39476089 = 4716^2 + 6283^2 .

It is a cyclic number.

It is not a de Polignac number, because 61716745 - 2³ = 61716737 is a prime.

It is a super-2 number, since 2×61716745² = 7617913226790050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6171670 + ... + 6171679.

It is an arithmetic number, because the mean of its divisors is an integer number (18515025).

Almost surely, 2^61716745 is an apocalyptic number.

It is an amenable number.

61716745 is a deficient number, since it is larger than the sum of its proper divisors (12343355).

61716745 is a wasteful number, since it uses less digits than its factorization.

61716745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12343354.

The product of its digits is 35280, while the sum is 37.

The square root of 61716745 is about 7856.0005728106. Note that the first 3 decimals coincide. The cubic root of 61716745 is about 395.1855027853.

The spelling of 61716745 in words is "sixty-one million, seven hundred sixteen thousand, seven hundred forty-five".