4191878964 has 96 divisors (see below), whose sum is σ = 12242442240. Its totient is φ = 1086795648.

The previous prime is 4191878953. The next prime is 4191878969. The reversal of 4191878964 is 4698781914.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4191878969) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31897 + ... + 96959.

It is an arithmetic number, because the mean of its divisors is an integer number (127525440).

Almost surely, 2^4191878964 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 4191878964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6121221120).

4191878964 is an abundant number, since it is smaller than the sum of its proper divisors (8050563276).

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

4191878964 is a wasteful number, since it uses less digits than its factorization.

4191878964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65149 (or 65147 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 57.

The square root of 4191878964 is about 64744.7215145760. The cubic root of 4191878964 is about 1612.3880772747.

The spelling of 4191878964 in words is "four billion, one hundred ninety-one million, eight hundred seventy-eight thousand, nine hundred sixty-four".