61688361 has 16 divisors (see below), whose sum is σ = 96543104. Its totient is φ = 34297344.

The previous prime is 61688353. The next prime is 61688371. The reversal of 61688361 is 16388616.

61688361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61688361 - 2³ = 61688353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61688321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38920 + ... + 40473.

It is an arithmetic number, because the mean of its divisors is an integer number (6033944).

Almost surely, 2^61688361 is an apocalyptic number.

It is an amenable number.

61688361 is a deficient number, since it is larger than the sum of its proper divisors (34854743).

61688361 is a wasteful number, since it uses less digits than its factorization.

61688361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79440.

The product of its digits is 41472, while the sum is 39.

The square root of 61688361 is about 7854.1938478752. The cubic root of 61688361 is about 395.1249105569.

The spelling of 61688361 in words is "sixty-one million, six hundred eighty-eight thousand, three hundred sixty-one".