28287474503641 has 4 divisors (see below), whose sum is σ = 28628287449552. Its totient is φ = 27946661557732.

The previous prime is 28287474503611. The next prime is 28287474503681. The reversal of 28287474503641 is 14630547478282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28287474503641 - 2¹⁵ = 28287474470873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28287474503641.

It is not an unprimeable number, because it can be changed into a prime (28287474503611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170406472831 + ... + 170406472996.

It is an arithmetic number, because the mean of its divisors is an integer number (7157071862388).

Almost surely, 2^{28287474503641} is an apocalyptic number.

It is an amenable number.

28287474503641 is a deficient number, since it is larger than the sum of its proper divisors (340812945911).

28287474503641 is an equidigital number, since it uses as much as digits as its factorization.

28287474503641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340812945910.

The product of its (nonzero) digits is 72253440, while the sum is 61.

The spelling of 28287474503641 in words is "twenty-eight trillion, two hundred eighty-seven billion, four hundred seventy-four million, five hundred three thousand, six hundred forty-one".