28112434551 has 12 divisors (see below), whose sum is σ = 40672671312. Its totient is φ = 18711243936.

The previous prime is 28112434541. The next prime is 28112434579. The reversal of 28112434551 is 15543421182.

28112434551 is a `hidden beast` number, since 2 + 81 + 1 + 24 + 3 + 4 + 551 = 666.

It is not a de Polignac number, because 28112434551 - 2¹⁰ = 28112433527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28112434501) 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, 2525731 + ... + 2536836.

It is an arithmetic number, because the mean of its divisors is an integer number (3389389276).

Almost surely, 2^28112434551 is an apocalyptic number.

28112434551 is a deficient number, since it is larger than the sum of its proper divisors (12560236761).

28112434551 is a wasteful number, since it uses less digits than its factorization.

28112434551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5063190 (or 5063187 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The spelling of 28112434551 in words is "twenty-eight billion, one hundred twelve million, four hundred thirty-four thousand, five hundred fifty-one".