28025025549 has 8 divisors (see below), whose sum is σ = 37411241280. Its totient is φ = 18661080096.

The previous prime is 28025025541. The next prime is 28025025557. The reversal of 28025025549 is 94552052082.

It is an interprime number because it is at equal distance from previous prime (28025025541) and next prime (28025025557).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28025025549 - 2³ = 28025025541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28025025549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28025025541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5564632 + ... + 5569665.

It is an arithmetic number, because the mean of its divisors is an integer number (4676405160).

Almost surely, 2^28025025549 is an apocalyptic number.

It is an amenable number.

28025025549 is a deficient number, since it is larger than the sum of its proper divisors (9386215731).

28025025549 is a wasteful number, since it uses less digits than its factorization.

28025025549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11135139.

The product of its (nonzero) digits is 288000, while the sum is 42.

The spelling of 28025025549 in words is "twenty-eight billion, twenty-five million, twenty-five thousand, five hundred forty-nine".