4991188736 has 72 divisors (see below), whose sum is σ = 10535389200. Its totient is φ = 2353397760.

The previous prime is 4991188723. The next prime is 4991188757. The reversal of 4991188736 is 6378811994.

It is a Smith number, since the sum of its digits (56) 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 7 ways as a sum of consecutive naturals, for example, 1111616 + ... + 1116096.

It is an arithmetic number, because the mean of its divisors is an integer number (146324850).

Almost surely, 2^4991188736 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 4991188736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5267694600).

4991188736 is an abundant number, since it is smaller than the sum of its proper divisors (5544200464).

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

4991188736 is a wasteful number, since it uses less digits than its factorization.

4991188736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4745 (or 4731 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 56.

The square root of 4991188736 is about 70648.3455998794. The cubic root of 4991188736 is about 1708.9708860884.

The spelling of 4991188736 in words is "four billion, nine hundred ninety-one million, one hundred eighty-eight thousand, seven hundred thirty-six".