39128976489 has 4 divisors (see below), whose sum is σ = 52171968656. Its totient is φ = 26085984324.

The previous prime is 39128976473. The next prime is 39128976499. The reversal of 39128976489 is 98467982193.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 39128976489 - 2⁴ = 39128976473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39128976499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6521496079 + ... + 6521496084.

It is an arithmetic number, because the mean of its divisors is an integer number (13042992164).

Almost surely, 2^39128976489 is an apocalyptic number.

It is an amenable number.

39128976489 is a deficient number, since it is larger than the sum of its proper divisors (13042992167).

39128976489 is a wasteful number, since it uses less digits than its factorization.

39128976489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13042992166.

The product of its digits is 47029248, while the sum is 66.

The spelling of 39128976489 in words is "thirty-nine billion, one hundred twenty-eight million, nine hundred seventy-six thousand, four hundred eighty-nine".