61608138 has 8 divisors (see below), whose sum is σ = 123216288. Its totient is φ = 20536044.

The previous prime is 61608133. The next prime is 61608143. The reversal of 61608138 is 83180616.

It is an interprime number because it is at equal distance from previous prime (61608133) and next prime (61608143).

It is a sphenic number, since it is the product of 3 distinct primes.

61608138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 61608099 and 61608108.

It is not an unprimeable number, because it can be changed into a prime (61608133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5134006 + ... + 5134017.

It is an arithmetic number, because the mean of its divisors is an integer number (15402036).

Almost surely, 2^61608138 is an apocalyptic number.

61608138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61608138 is a wasteful number, since it uses less digits than its factorization.

61608138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10268028.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 61608138 is about 7849.0851696233. The cubic root of 61608138 is about 394.9535554002.

The spelling of 61608138 in words is "sixty-one million, six hundred eight thousand, one hundred thirty-eight".