61618344 has 32 divisors (see below), whose sum is σ = 156219840. Its totient is φ = 20249600.

The previous prime is 61618343. The next prime is 61618369. The reversal of 61618344 is 44381616.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (61618343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16377 + ... + 19784.

It is an arithmetic number, because the mean of its divisors is an integer number (4881870).

Almost surely, 2^61618344 is an apocalyptic number.

It is an amenable number.

61618344 is an abundant number, since it is smaller than the sum of its proper divisors (94601496).

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

61618344 is a wasteful number, since it uses less digits than its factorization.

61618344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36241 (or 36237 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 61618344 is about 7849.7352821608. The cubic root of 61618344 is about 394.9753635225.

The spelling of 61618344 in words is "sixty-one million, six hundred eighteen thousand, three hundred forty-four".