61683384349 has 8 divisors (see below), whose sum is σ = 63333805752. Its totient is φ = 60039912960.

The previous prime is 61683384319. The next prime is 61683384377. The reversal of 61683384349 is 94348338616.

61683384349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2138600025 + 59544784324 = 46245^2 + 244018^2 .

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 61683384349 - 2⁵ = 61683384317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61683384349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61683384319) 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, 1719514 + ... + 1755019.

It is an arithmetic number, because the mean of its divisors is an integer number (7916725719).

Almost surely, 2^61683384349 is an apocalyptic number.

It is an amenable number.

61683384349 is a deficient number, since it is larger than the sum of its proper divisors (1650421403).

61683384349 is a wasteful number, since it uses less digits than its factorization.

61683384349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3475007.

The product of its digits is 8957952, while the sum is 55.

The spelling of 61683384349 in words is "sixty-one billion, six hundred eighty-three million, three hundred eighty-four thousand, three hundred forty-nine".