28172053513236 has 24 divisors (see below), whose sum is σ = 65776634217504. Its totient is φ = 9384706977760.

The previous prime is 28172053513207. The next prime is 28172053513271. The reversal of 28172053513236 is 63231535027182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747171195 + ... + 747208898.

It is an arithmetic number, because the mean of its divisors is an integer number (2740693092396).

Almost surely, 2^{28172053513236} is an apocalyptic number.

It is an amenable number.

28172053513236 is an abundant number, since it is smaller than the sum of its proper divisors (37604580704268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28172053513236 is a wasteful number, since it uses less digits than its factorization.

28172053513236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494381671 (or 1494381669 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 28172053513236 in words is "twenty-eight trillion, one hundred seventy-two billion, fifty-three million, five hundred thirteen thousand, two hundred thirty-six".