4042049991 has 16 divisors (see below), whose sum is σ = 6190272000. Its totient is φ = 2298133728.

The previous prime is 4042049989. The next prime is 4042050007. The reversal of 4042049991 is 1999402404.

It is not a de Polignac number, because 4042049991 - 2¹ = 4042049989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042049981) 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, 479436 + ... + 487793.

It is an arithmetic number, because the mean of its divisors is an integer number (386892000).

Almost surely, 2^4042049991 is an apocalyptic number.

4042049991 is a deficient number, since it is larger than the sum of its proper divisors (2148222009).

4042049991 is a wasteful number, since it uses less digits than its factorization.

4042049991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967438.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 4042049991 is about 63577.1184546768. The cubic root of 4042049991 is about 1592.9441896961.

The spelling of 4042049991 in words is "four billion, forty-two million, forty-nine thousand, nine hundred ninety-one".