28065051657 has 48 divisors (see below), whose sum is σ = 42329903616. Its totient is φ = 17898048000.

The previous prime is 28065051583. The next prime is 28065051671. The reversal of 28065051657 is 75615056082.

28065051657 is a `hidden beast` number, since 2 + 80 + 6 + 5 + 0 + 516 + 57 = 666.

It is not a de Polignac number, because 28065051657 - 2⁸ = 28065051401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28065052657) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14532982 + ... + 14534912.

It is an arithmetic number, because the mean of its divisors is an integer number (881872992).

Almost surely, 2^28065051657 is an apocalyptic number.

It is an amenable number.

28065051657 is a deficient number, since it is larger than the sum of its proper divisors (14264851959).

28065051657 is a wasteful number, since it uses less digits than its factorization.

28065051657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2542 (or 2539 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The spelling of 28065051657 in words is "twenty-eight billion, sixty-five million, fifty-one thousand, six hundred fifty-seven".