28811667577 has 16 divisors (see below), whose sum is σ = 37482826752. Its totient is φ = 21474533520.

The previous prime is 28811667571. The next prime is 28811667581. The reversal of 28811667577 is 77576611882.

It is not a de Polignac number, because 28811667577 - 2¹¹ = 28811665529 is a prime.

It is a super-2 number, since 2×28811667577² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28811667571) 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 15 ways as a sum of consecutive naturals, for example, 8132523 + ... + 8136064.

It is an arithmetic number, because the mean of its divisors is an integer number (2342676672).

Almost surely, 2^28811667577 is an apocalyptic number.

It is an amenable number.

28811667577 is a deficient number, since it is larger than the sum of its proper divisors (8671159175).

28811667577 is a wasteful number, since it uses less digits than its factorization.

28811667577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16268628.

The product of its digits is 7902720, while the sum is 58.

The spelling of 28811667577 in words is "twenty-eight billion, eight hundred eleven million, six hundred sixty-seven thousand, five hundred seventy-seven".