28521795122 has 6 divisors (see below), whose sum is σ = 42783050943. Its totient is φ = 14260778142.

The previous prime is 28521795119. The next prime is 28521795143. The reversal of 28521795122 is 22159712582.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14260897561 + 14260897561 = 119419^2 + 119419^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=119419.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 179129 + ... + 298547.

Almost surely, 2^28521795122 is an apocalyptic number.

28521795122 is a deficient number, since it is larger than the sum of its proper divisors (14261255821).

28521795122 is an frugal number, since it uses more digits than its factorization.

28521795122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238840 (or 119421 counting only the distinct ones).

The product of its digits is 201600, while the sum is 44.

The spelling of 28521795122 in words is "twenty-eight billion, five hundred twenty-one million, seven hundred ninety-five thousand, one hundred twenty-two".