28063143855 has 48 divisors (see below), whose sum is σ = 50260654080. Its totient is φ = 14470142400.

The previous prime is 28063143853. The next prime is 28063143859. The reversal of 28063143855 is 55834136082.

28063143855 is a `hidden beast` number, since 2 + 8 + 0 + 631 + 4 + 3 + 8 + 5 + 5 = 666.

It is not a de Polignac number, because 28063143855 - 2¹ = 28063143853 is a prime.

It is a super-2 number, since 2×28063143855² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28063143855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28063143853) 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 47 ways as a sum of consecutive naturals, for example, 1512726 + ... + 1531164.

It is an arithmetic number, because the mean of its divisors is an integer number (1047096960).

Almost surely, 2^28063143855 is an apocalyptic number.

28063143855 is a deficient number, since it is larger than the sum of its proper divisors (22197510225).

28063143855 is a wasteful number, since it uses less digits than its factorization.

28063143855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19572 (or 19569 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 28063143855 in words is "twenty-eight billion, sixty-three million, one hundred forty-three thousand, eight hundred fifty-five".