13557201128 has 24 divisors (see below), whose sum is σ = 25659468450. Its totient is φ = 6714708192.

The previous prime is 13557201109. The next prime is 13557201169. The reversal of 13557201128 is 82110275531.

It can be written as a sum of positive squares in only one way, i.e., 10509940324 + 3047260804 = 102518^2 + 55202^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3436325 + ... + 3440267.

Almost surely, 2^13557201128 is an apocalyptic number.

It is an amenable number.

13557201128 is a deficient number, since it is larger than the sum of its proper divisors (12102267322).

13557201128 is an frugal number, since it uses more digits than its factorization.

13557201128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8001 (or 4054 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 35.

Adding to 13557201128 its reverse (82110275531), we get a palindrome (95667476659).

The spelling of 13557201128 in words is "thirteen billion, five hundred fifty-seven million, two hundred one thousand, one hundred twenty-eight".