28553691951 has 12 divisors (see below), whose sum is σ = 42250178880. Its totient is φ = 18571506720.

The previous prime is 28553691937. The next prime is 28553691953. The reversal of 28553691951 is 15919635582.

28553691951 is a `hidden beast` number, since 28 + 553 + 6 + 9 + 19 + 51 = 666.

It is not a de Polignac number, because 28553691951 - 2¹¹ = 28553689903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28553691953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38690271 + ... + 38691008.

It is an arithmetic number, because the mean of its divisors is an integer number (3520848240).

Almost surely, 2^28553691951 is an apocalyptic number.

28553691951 is a deficient number, since it is larger than the sum of its proper divisors (13696486929).

28553691951 is a wasteful number, since it uses less digits than its factorization.

28553691951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77381326 (or 77381323 counting only the distinct ones).

The product of its digits is 2916000, while the sum is 54.

The spelling of 28553691951 in words is "twenty-eight billion, five hundred fifty-three million, six hundred ninety-one thousand, nine hundred fifty-one".