28626615361 has 4 divisors (see below), whose sum is σ = 28628890452. Its totient is φ = 28624340272.

The previous prime is 28626615319. The next prime is 28626615377. The reversal of 28626615361 is 16351662682.

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 9301445136 + 19325170225 = 96444^2 + 139015^2 .

It is a cyclic number.

It is not a de Polignac number, because 28626615361 - 2⁷ = 28626615233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28626610361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118566 + ... + 1143871.

It is an arithmetic number, because the mean of its divisors is an integer number (7157222613).

Almost surely, 2^28626615361 is an apocalyptic number.

It is an amenable number.

28626615361 is a deficient number, since it is larger than the sum of its proper divisors (2275091).

28626615361 is a wasteful number, since it uses less digits than its factorization.

28626615361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275090.

The product of its digits is 622080, while the sum is 46.

The spelling of 28626615361 in words is "twenty-eight billion, six hundred twenty-six million, six hundred fifteen thousand, three hundred sixty-one".