28653788775 has 12 divisors (see below), whose sum is σ = 47374264232. Its totient is φ = 15282020640.

The previous prime is 28653788767. The next prime is 28653788797. The reversal of 28653788775 is 57788735682.

It is not a de Polignac number, because 28653788775 - 2³ = 28653788767 is a prime.

It is a super-2 number, since 2×28653788775² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191025184 + ... + 191025333.

Almost surely, 2^28653788775 is an apocalyptic number.

28653788775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28653788775 is a deficient number, since it is larger than the sum of its proper divisors (18720475457).

28653788775 is a wasteful number, since it uses less digits than its factorization.

28653788775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382050530 (or 382050525 counting only the distinct ones).

The product of its digits is 158054400, while the sum is 66.

The spelling of 28653788775 in words is "twenty-eight billion, six hundred fifty-three million, seven hundred eighty-eight thousand, seven hundred seventy-five".