28553748261 has 16 divisors (see below), whose sum is σ = 39389837760. Its totient is φ = 18376924160.

The previous prime is 28553748257. The next prime is 28553748263. The reversal of 28553748261 is 16284735582.

It is not a de Polignac number, because 28553748261 - 2² = 28553748257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28553748263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 789766 + ... + 825128.

It is an arithmetic number, because the mean of its divisors is an integer number (2461864860).

Almost surely, 2^28553748261 is an apocalyptic number.

It is an amenable number.

28553748261 is a deficient number, since it is larger than the sum of its proper divisors (10836089499).

28553748261 is a wasteful number, since it uses less digits than its factorization.

28553748261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44676.

The product of its digits is 3225600, while the sum is 51.

The spelling of 28553748261 in words is "twenty-eight billion, five hundred fifty-three million, seven hundred forty-eight thousand, two hundred sixty-one".