28947405553 has 4 divisors (see below), whose sum is σ = 31578987888. Its totient is φ = 26315823220.

The previous prime is 28947405533. The next prime is 28947405593. The reversal of 28947405553 is 35550474982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28947405553 - 2⁹ = 28947405041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28947405553.

It is not an unprimeable number, because it can be changed into a prime (28947405523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315791151 + ... + 1315791172.

It is an arithmetic number, because the mean of its divisors is an integer number (7894746972).

Almost surely, 2^28947405553 is an apocalyptic number.

It is an amenable number.

28947405553 is a deficient number, since it is larger than the sum of its proper divisors (2631582335).

28947405553 is a wasteful number, since it uses less digits than its factorization.

28947405553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631582334.

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 28947405553 in words is "twenty-eight billion, nine hundred forty-seven million, four hundred five thousand, five hundred fifty-three".