28363142557 has 4 divisors (see below), whose sum is σ = 28365966720. Its totient is φ = 28360318396.

The previous prime is 28363142501. The next prime is 28363142579. The reversal of 28363142557 is 75524136382.

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 28363142557 - 2¹⁹ = 28362618269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28363149557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1396963 + ... + 1417120.

It is an arithmetic number, because the mean of its divisors is an integer number (7091491680).

Almost surely, 2^28363142557 is an apocalyptic number.

It is an amenable number.

28363142557 is a deficient number, since it is larger than the sum of its proper divisors (2824163).

28363142557 is a wasteful number, since it uses less digits than its factorization.

28363142557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824162.

The product of its digits is 1209600, while the sum is 46.

The spelling of 28363142557 in words is "twenty-eight billion, three hundred sixty-three million, one hundred forty-two thousand, five hundred fifty-seven".