28481863671 has 6 divisors (see below), whose sum is σ = 41140469760. Its totient is φ = 18987909108.

The previous prime is 28481863649. The next prime is 28481863763. The reversal of 28481863671 is 17636818482.

28481863671 is a `hidden beast` number, since 28 + 481 + 86 + 3 + 67 + 1 = 666.

It is not a de Polignac number, because 28481863671 - 2¹⁵ = 28481830903 is a prime.

It is a super-2 number, since 2×28481863671² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28481863621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1582325751 + ... + 1582325768.

It is an arithmetic number, because the mean of its divisors is an integer number (6856744960).

Almost surely, 2^28481863671 is an apocalyptic number.

28481863671 is a deficient number, since it is larger than the sum of its proper divisors (12658606089).

28481863671 is a wasteful number, since it uses less digits than its factorization.

28481863671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3164651525 (or 3164651522 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 28481863671 in words is "twenty-eight billion, four hundred eighty-one million, eight hundred sixty-three thousand, six hundred seventy-one".