28715563741 has 4 divisors (see below), whose sum is σ = 28813569372. Its totient is φ = 28617558112.

The previous prime is 28715563703. The next prime is 28715563757. The reversal of 28715563741 is 14736551782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23232161241 + 5483402500 = 152421^2 + 74050^2 .

It is a cyclic number.

It is not a de Polignac number, because 28715563741 - 2⁹ = 28715563229 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28715561741) 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, 49002376 + ... + 49002961.

It is an arithmetic number, because the mean of its divisors is an integer number (7203392343).

Almost surely, 2^28715563741 is an apocalyptic number.

It is an amenable number.

28715563741 is a deficient number, since it is larger than the sum of its proper divisors (98005631).

28715563741 is an equidigital number, since it uses as much as digits as its factorization.

28715563741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98005630.

The product of its digits is 1411200, while the sum is 49.

The spelling of 28715563741 in words is "twenty-eight billion, seven hundred fifteen million, five hundred sixty-three thousand, seven hundred forty-one".