839021468781 has 32 divisors (see below), whose sum is σ = 1159623504000. Its totient is φ = 539183796480.

The previous prime is 839021468777. The next prime is 839021468797. The reversal of 839021468781 is 187864120938.

It is not a de Polignac number, because 839021468781 - 2² = 839021468777 is a prime.

It is a super-2 number, since 2×839021468781² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (839021468281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6368466 + ... + 6498876.

It is an arithmetic number, because the mean of its divisors is an integer number (36238234500).

Almost surely, 2^839021468781 is an apocalyptic number.

It is an amenable number.

839021468781 is a deficient number, since it is larger than the sum of its proper divisors (320602035219).

839021468781 is a wasteful number, since it uses less digits than its factorization.

839021468781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130989.

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 839021468781 in words is "eight hundred thirty-nine billion, twenty-one million, four hundred sixty-eight thousand, seven hundred eighty-one".