39118438491 has 16 divisors (see below), whose sum is σ = 56968723200. Its totient is φ = 23679321120.

The previous prime is 39118438483. The next prime is 39118438501. The reversal of 39118438491 is 19483481193.

It is not a de Polignac number, because 39118438491 - 2³ = 39118438483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39118438451) 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, 693016 + ... + 747333.

It is an arithmetic number, because the mean of its divisors is an integer number (3560545200).

Almost surely, 2^39118438491 is an apocalyptic number.

39118438491 is a deficient number, since it is larger than the sum of its proper divisors (17850284709).

39118438491 is a wasteful number, since it uses less digits than its factorization.

39118438491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441186.

The product of its digits is 746496, while the sum is 51.

The spelling of 39118438491 in words is "thirty-nine billion, one hundred eighteen million, four hundred thirty-eight thousand, four hundred ninety-one".