4991571904 has 56 divisors (see below), whose sum is σ = 10912760496. Its totient is φ = 2246400000.

The previous prime is 4991571887. The next prime is 4991571917. The reversal of 4991571904 is 4091751994.

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, 36004 + ... + 106204.

Almost surely, 2^4991571904 is an apocalyptic number.

4991571904 is a gapful number since it is divisible by the number (44) 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 4991571904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5456380248).

4991571904 is an abundant number, since it is smaller than the sum of its proper divisors (5921188592).

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

4991571904 is a wasteful number, since it uses less digits than its factorization.

4991571904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70325 (or 70315 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 4991571904 is about 70651.0573452372. The cubic root of 4991571904 is about 1709.0146168998.

The spelling of 4991571904 in words is "four billion, nine hundred ninety-one million, five hundred seventy-one thousand, nine hundred four".