28176602864421 has 16 divisors (see below), whose sum is σ = 40986702808128. Its totient is φ = 17075665180800.

The previous prime is 28176602864407. The next prime is 28176602864429. The reversal of 28176602864421 is 12446820667182.

It is a happy number.

It is not a de Polignac number, because 28176602864421 - 2¹⁸ = 28176602602277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28176602864429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26057790 + ... + 27117551.

It is an arithmetic number, because the mean of its divisors is an integer number (2561668925508).

Almost surely, 2^{28176602864421} is an apocalyptic number.

It is an amenable number.

28176602864421 is a deficient number, since it is larger than the sum of its proper divisors (12810099943707).

28176602864421 is a wasteful number, since it uses less digits than its factorization.

28176602864421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53191412.

The product of its (nonzero) digits is 12386304, while the sum is 57.

The spelling of 28176602864421 in words is "twenty-eight trillion, one hundred seventy-six billion, six hundred two million, eight hundred sixty-four thousand, four hundred twenty-one".