6139782831921 has 16 divisors (see below), whose sum is σ = 8197604452800. Its totient is φ = 4087575430848.

The previous prime is 6139782831913. The next prime is 6139782831947. The reversal of 6139782831921 is 1291382879316.

It is a happy number.

It is not a de Polignac number, because 6139782831921 - 2³ = 6139782831913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6139782831901) 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, 54695470 + ... + 54807608.

It is an arithmetic number, because the mean of its divisors is an integer number (512350278300).

Almost surely, 2^{6139782831921} is an apocalyptic number.

It is an amenable number.

6139782831921 is a deficient number, since it is larger than the sum of its proper divisors (2057821620879).

6139782831921 is a wasteful number, since it uses less digits than its factorization.

6139782831921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137008.

The product of its digits is 7838208, while the sum is 60.

The spelling of 6139782831921 in words is "six trillion, one hundred thirty-nine billion, seven hundred eighty-two million, eight hundred thirty-one thousand, nine hundred twenty-one".