169238447506 has 16 divisors (see below), whose sum is σ = 255369129624. Its totient is φ = 84115573504.

The previous prime is 169238447503. The next prime is 169238447531. The reversal of 169238447506 is 605744832961.

It can be written as a sum of positive squares in 4 ways, for example, as 137770880625 + 31467566881 = 371175^2 + 177391^2 .

It is a super-2 number, since 2×169238447506² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (169238447503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2125836 + ... + 2204008.

It is a 2-persistent number, because it is pandigital, and so is 2⋅169238447506 = 338476895012, but 3⋅169238447506 = 507715342518 is not.

Almost surely, 2^169238447506 is an apocalyptic number.

169238447506 is a deficient number, since it is larger than the sum of its proper divisors (86130682118).

169238447506 is a wasteful number, since it uses less digits than its factorization.

169238447506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84605.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 169238447506 in words is "one hundred sixty-nine billion, two hundred thirty-eight million, four hundred forty-seven thousand, five hundred six".