3991010535 has 80 divisors (see below), whose sum is σ = 7279398720. Its totient is φ = 2091640320.

The previous prime is 3991010533. The next prime is 3991010549. The reversal of 3991010535 is 5350101993.

3991010535 is a `hidden beast` number, since 39 + 91 + 0 + 1 + 0 + 535 = 666.

It is not a de Polignac number, because 3991010535 - 2¹ = 3991010533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3991010535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991010533) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9479625 + ... + 9480045.

It is an arithmetic number, because the mean of its divisors is an integer number (90992484).

Almost surely, 2^3991010535 is an apocalyptic number.

3991010535 is a deficient number, since it is larger than the sum of its proper divisors (3288388185).

3991010535 is a wasteful number, since it uses less digits than its factorization.

3991010535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 781 counting only the distinct ones).

The product of its (nonzero) digits is 18225, while the sum is 36.

The square root of 3991010535 is about 63174.4452686369. The cubic root of 3991010535 is about 1586.2110028473.

The spelling of 3991010535 in words is "three billion, nine hundred ninety-one million, ten thousand, five hundred thirty-five".