3991051456 has 112 divisors (see below), whose sum is σ = 9405518400. Its totient is φ = 1644023808.

The previous prime is 3991051451. The next prime is 3991051457. The reversal of 3991051456 is 6541501993.

3991051456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (3991051451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3598230 + ... + 3599338.

Almost surely, 2^3991051456 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 3991051456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4702759200).

3991051456 is an abundant number, since it is smaller than the sum of its proper divisors (5414466944).

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

3991051456 is a wasteful number, since it uses less digits than its factorization.

3991051456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434 (or 1424 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 3991051456 is about 63174.7691408524. The cubic root of 3991051456 is about 1586.2164241241.

The spelling of 3991051456 in words is "three billion, nine hundred ninety-one million, fifty-one thousand, four hundred fifty-six".