133428619172 has 24 divisors (see below), whose sum is σ = 241850561400. Its totient is φ = 64334149376.

The previous prime is 133428619171. The next prime is 133428619213. The reversal of 133428619172 is 271916824331.

It can be written as a sum of positive squares in 4 ways, for example, as 58251753316 + 75176865856 = 241354^2 + 274184^2 .

It is not an unprimeable number, because it can be changed into a prime (133428619171) 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, 617063 + ... + 804750.

It is an arithmetic number, because the mean of its divisors is an integer number (10077106725).

Almost surely, 2^133428619172 is an apocalyptic number.

It is an amenable number.

133428619172 is a deficient number, since it is larger than the sum of its proper divisors (108421942228).

133428619172 is a wasteful number, since it uses less digits than its factorization.

133428619172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422655 (or 1422653 counting only the distinct ones).

The product of its digits is 435456, while the sum is 47.

The spelling of 133428619172 in words is "one hundred thirty-three billion, four hundred twenty-eight million, six hundred nineteen thousand, one hundred seventy-two".