61871493184 has 56 divisors (see below), whose sum is σ = 125756517600. Its totient is φ = 30192368640.

The previous prime is 61871493181. The next prime is 61871493209. The reversal of 61871493184 is 48139417816.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61871493181) 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, 465924 + ... + 583804.

It is an arithmetic number, because the mean of its divisors is an integer number (2245652100).

Almost surely, 2^61871493184 is an apocalyptic number.

61871493184 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61871493184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62878258800).

61871493184 is an abundant number, since it is smaller than the sum of its proper divisors (63885024416).

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

61871493184 is a wasteful number, since it uses less digits than its factorization.

61871493184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118091 (or 118081 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 52.

The spelling of 61871493184 in words is "sixty-one billion, eight hundred seventy-one million, four hundred ninety-three thousand, one hundred eighty-four".