28025025550 has 12 divisors (see below), whose sum is σ = 52126547616. Its totient is φ = 11210010200.

The previous prime is 28025025541. The next prime is 28025025557. The reversal of 28025025550 is 5552052082.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28025025557) 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, 280250206 + ... + 280250305.

It is an arithmetic number, because the mean of its divisors is an integer number (4343878968).

Almost surely, 2^28025025550 is an apocalyptic number.

28025025550 is a deficient number, since it is larger than the sum of its proper divisors (24101522066).

28025025550 is a wasteful number, since it uses less digits than its factorization.

28025025550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560500523 (or 560500518 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 28025025550 in words is "twenty-eight billion, twenty-five million, twenty-five thousand, five hundred fifty".