61389321336 has 192 divisors, whose sum is σ = 197461555200. Its totient is φ = 17503371648.

The previous prime is 61389321317. The next prime is 61389321397. The reversal of 61389321336 is 63312398316.

61389321336 is a `hidden beast` number, since 613 + 8 + 9 + 3 + 21 + 3 + 3 + 6 = 666.

61389321336 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 61389321291 and 61389321300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6922041 + ... + 6930903.

It is an arithmetic number, because the mean of its divisors is an integer number (1028445600).

Almost surely, 2^61389321336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61389321336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98730777600).

61389321336 is an abundant number, since it is smaller than the sum of its proper divisors (136072233864).

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

61389321336 is a wasteful number, since it uses less digits than its factorization.

61389321336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9400 (or 9384 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The spelling of 61389321336 in words is "sixty-one billion, three hundred eighty-nine million, three hundred twenty-one thousand, three hundred thirty-six".