839491368645 has 16 divisors (see below), whose sum is σ = 1344818270592. Its totient is φ = 447184703040.

The previous prime is 839491368643. The next prime is 839491368649. The reversal of 839491368645 is 546863194938.

It is not a de Polignac number, because 839491368645 - 2¹ = 839491368643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (839491368643) 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, 33988926 + ... + 34013615.

It is an arithmetic number, because the mean of its divisors is an integer number (84051141912).

Almost surely, 2^839491368645 is an apocalyptic number.

It is an amenable number.

839491368645 is a deficient number, since it is larger than the sum of its proper divisors (505326901947).

839491368645 is a wasteful number, since it uses less digits than its factorization.

839491368645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68003372.

The product of its digits is 134369280, while the sum is 66.

The spelling of 839491368645 in words is "eight hundred thirty-nine billion, four hundred ninety-one million, three hundred sixty-eight thousand, six hundred forty-five".