28570540641 has 4 divisors (see below), whose sum is σ = 38094054192. Its totient is φ = 19047027092.

The previous prime is 28570540639. The next prime is 28570540681. The reversal of 28570540641 is 14604507582.

It is a happy number.

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 28570540641 - 2¹ = 28570540639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28570540593 and 28570540602.

It is not an unprimeable number, because it can be changed into a prime (28570540681) 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, 4761756771 + ... + 4761756776.

It is an arithmetic number, because the mean of its divisors is an integer number (9523513548).

Almost surely, 2^28570540641 is an apocalyptic number.

It is an amenable number.

28570540641 is a deficient number, since it is larger than the sum of its proper divisors (9523513551).

28570540641 is an equidigital number, since it uses as much as digits as its factorization.

28570540641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9523513550.

The product of its (nonzero) digits is 268800, while the sum is 42.

The spelling of 28570540641 in words is "twenty-eight billion, five hundred seventy million, five hundred forty thousand, six hundred forty-one".