61684336164 has 96 divisors (see below), whose sum is σ = 161269678080. Its totient is φ = 18188089600.

The previous prime is 61684336139. The next prime is 61684336229. The reversal of 61684336164 is 46163348616.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2057917 + ... + 2087675.

It is an arithmetic number, because the mean of its divisors is an integer number (1679892480).

Almost surely, 2^61684336164 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 61684336164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80634839040).

61684336164 is an abundant number, since it is smaller than the sum of its proper divisors (99585341916).

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

61684336164 is a wasteful number, since it uses less digits than its factorization.

61684336164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30201 (or 30199 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 48.

The spelling of 61684336164 in words is "sixty-one billion, six hundred eighty-four million, three hundred thirty-six thousand, one hundred sixty-four".