3991539742019 has 8 divisors (see below), whose sum is σ = 4155575624640. Its totient is φ = 3830459461056.

The previous prime is 3991539741991. The next prime is 3991539742067. The reversal of 3991539742019 is 9102479351993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3991539742019 - 2²⁸ = 3991271306563 is a prime.

It is a super-2 number, since 2×3991539742019² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3991539744019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738897659 + ... + 738903060.

It is an arithmetic number, because the mean of its divisors is an integer number (519446953080).

Almost surely, 2^{3991539742019} is an apocalyptic number.

3991539742019 is a deficient number, since it is larger than the sum of its proper divisors (164035882621).

3991539742019 is a wasteful number, since it uses less digits than its factorization.

3991539742019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477800829.

The product of its (nonzero) digits is 16533720, while the sum is 62.

The spelling of 3991539742019 in words is "three trillion, nine hundred ninety-one billion, five hundred thirty-nine million, seven hundred forty-two thousand, nineteen".