61031171180 has 96 divisors (see below), whose sum is σ = 148307725440. Its totient is φ = 20664483840.

The previous prime is 61031171177. The next prime is 61031171207. The reversal of 61031171180 is 8117113016.

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, 4438556 + ... + 4452284.

It is an arithmetic number, because the mean of its divisors is an integer number (1544872140).

Almost surely, 2^61031171180 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 61031171180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74153862720).

61031171180 is an abundant number, since it is smaller than the sum of its proper divisors (87276554260).

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

61031171180 is a wasteful number, since it uses less digits than its factorization.

61031171180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14139 (or 14137 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 29.

Adding to 61031171180 its reverse (8117113016), we get a palindrome (69148284196).

The spelling of 61031171180 in words is "sixty-one billion, thirty-one million, one hundred seventy-one thousand, one hundred eighty".