28083521425 has 24 divisors (see below), whose sum is σ = 36740158400. Its totient is φ = 21235711680.

The previous prime is 28083521413. The next prime is 28083521443. The reversal of 28083521425 is 52412538082.

It is not a de Polignac number, because 28083521425 - 2⁵ = 28083521393 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141187 + ... + 275863.

Almost surely, 2^28083521425 is an apocalyptic number.

28083521425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28083521425 is a deficient number, since it is larger than the sum of its proper divisors (8656636975).

28083521425 is a wasteful number, since it uses less digits than its factorization.

28083521425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135145 (or 135140 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

The spelling of 28083521425 in words is "twenty-eight billion, eighty-three million, five hundred twenty-one thousand, four hundred twenty-five".