61717944 has 16 divisors (see below), whose sum is σ = 154294920. Its totient is φ = 20572640.

The previous prime is 61717937. The next prime is 61717949. The reversal of 61717944 is 44971716.

It is a super-2 number, since 2×61717944² = 7618209223174272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61717949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285767 + ... + 1285814.

Almost surely, 2^61717944 is an apocalyptic number.

It is an amenable number.

61717944 is an abundant number, since it is smaller than the sum of its proper divisors (92576976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61717944 is a wasteful number, since it uses less digits than its factorization.

61717944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571590 (or 2571586 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 61717944 is about 7856.0768835342. The cubic root of 61717944 is about 395.1880619198.

The spelling of 61717944 in words is "sixty-one million, seven hundred seventeen thousand, nine hundred forty-four".