28081675557 has 48 divisors (see below), whose sum is σ = 44480986368. Its totient is φ = 16966247040.

The previous prime is 28081675553. The next prime is 28081675561. The reversal of 28081675557 is 75557618082.

28081675557 is a `hidden beast` number, since 2 + 8 + 0 + 8 + 16 + 75 + 557 = 666.

It is an interprime number because it is at equal distance from previous prime (28081675553) and next prime (28081675561).

It is not a de Polignac number, because 28081675557 - 2² = 28081675553 is a prime.

It is a super-2 number, since 2×28081675557² (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 (28081675553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4186068 + ... + 4192770.

It is an arithmetic number, because the mean of its divisors is an integer number (926687216).

Almost surely, 2^28081675557 is an apocalyptic number.

It is an amenable number.

28081675557 is a deficient number, since it is larger than the sum of its proper divisors (16399310811).

28081675557 is a wasteful number, since it uses less digits than its factorization.

28081675557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7370 (or 7367 counting only the distinct ones).

The product of its (nonzero) digits is 4704000, while the sum is 54.

The spelling of 28081675557 in words is "twenty-eight billion, eighty-one million, six hundred seventy-five thousand, five hundred fifty-seven".