61644113 has 8 divisors (see below), whose sum is σ = 65184000. Its totient is φ = 58133808.

The previous prime is 61644097. The next prime is 61644127. The reversal of 61644113 is 31144616.

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

It is a cyclic number.

It is not a de Polignac number, because 61644113 - 2⁴ = 61644097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61644133) 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, 3038 + ... + 11511.

It is an arithmetic number, because the mean of its divisors is an integer number (8148000).

Almost surely, 2^61644113 is an apocalyptic number.

It is an amenable number.

61644113 is a deficient number, since it is larger than the sum of its proper divisors (3539887).

61644113 is a wasteful number, since it uses less digits than its factorization.

61644113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14791.

The product of its digits is 1728, while the sum is 26.

The square root of 61644113 is about 7851.3765035183. The cubic root of 61644113 is about 395.0304158601.

Adding to 61644113 its reverse (31144616), we get a palindrome (92788729).

The spelling of 61644113 in words is "sixty-one million, six hundred forty-four thousand, one hundred thirteen".