168139258004 has 12 divisors (see below), whose sum is σ = 296218492500. Its totient is φ = 83505403008.

The previous prime is 168139258003. The next prime is 168139258009. The reversal of 168139258004 is 400852931861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 85206777604 + 82932480400 = 291902^2 + 287980^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 168139258004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168139258003) 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, 141055829 + ... + 141057020.

It is an arithmetic number, because the mean of its divisors is an integer number (24684874375).

Almost surely, 2^168139258004 is an apocalyptic number.

It is an amenable number.

168139258004 is a deficient number, since it is larger than the sum of its proper divisors (128079234496).

168139258004 is a wasteful number, since it uses less digits than its factorization.

168139258004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282113002 (or 282113000 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 168139258004 in words is "one hundred sixty-eight billion, one hundred thirty-nine million, two hundred fifty-eight thousand, four".