28055851517 has 16 divisors (see below), whose sum is σ = 29267246592. Its totient is φ = 26872684800.

The previous prime is 28055851507. The next prime is 28055851529. The reversal of 28055851517 is 71515855082.

It is a cyclic number.

It is not a de Polignac number, because 28055851517 - 2²⁸ = 27787416061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055851507) 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, 984848 + ... + 1012934.

It is an arithmetic number, because the mean of its divisors is an integer number (1829202912).

Almost surely, 2^28055851517 is an apocalyptic number.

It is an amenable number.

28055851517 is a deficient number, since it is larger than the sum of its proper divisors (1211395075).

28055851517 is a wasteful number, since it uses less digits than its factorization.

28055851517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28588.

The product of its (nonzero) digits is 560000, while the sum is 47.

The spelling of 28055851517 in words is "twenty-eight billion, fifty-five million, eight hundred fifty-one thousand, five hundred seventeen".