61171668865888 has 192 divisors, whose sum is σ = 142945666956288. Its totient is φ = 25230250967040.

The previous prime is 61171668865877. The next prime is 61171668865927. The reversal of 61171668865888 is 88856886617116.

It is a Smith number, since the sum of its digits (79) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 112344631 + ... + 112887817.

It is an arithmetic number, because the mean of its divisors is an integer number (744508682064).

Almost surely, 2^{61171668865888} 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 61171668865888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71472833478144).

61171668865888 is an abundant number, since it is smaller than the sum of its proper divisors (81773998090400).

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

61171668865888 is a wasteful number, since it uses less digits than its factorization.

61171668865888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543445 (or 543437 counting only the distinct ones).

The product of its digits is 1486356480, while the sum is 79.

The spelling of 61171668865888 in words is "sixty-one trillion, one hundred seventy-one billion, six hundred sixty-eight million, eight hundred sixty-five thousand, eight hundred eighty-eight".