28247118631013 has 6 divisors (see below), whose sum is σ = 30006454739826. Its totient is φ = 26585523417152.

The previous prime is 28247118631009. The next prime is 28247118631031. The reversal of 28247118631013 is 31013681174282.

It can be written as a sum of positive squares in 3 ways, for example, as 17850472900324 + 10396645730689 = 4224982^2 + 3224383^2 .

It is not a de Polignac number, because 28247118631013 - 2² = 28247118631009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28247118691013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48870447170 + ... + 48870447747.

It is an arithmetic number, because the mean of its divisors is an integer number (5001075789971).

Almost surely, 2^{28247118631013} is an apocalyptic number.

It is an amenable number.

28247118631013 is a deficient number, since it is larger than the sum of its proper divisors (1759336108813).

28247118631013 is an equidigital number, since it uses as much as digits as its factorization.

28247118631013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97740894951 (or 97740894934 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 28247118631013 in words is "twenty-eight trillion, two hundred forty-seven billion, one hundred eighteen million, six hundred thirty-one thousand, thirteen".