28783712511 has 24 divisors (see below), whose sum is σ = 42102942336. Its totient is φ = 18946437840.

The previous prime is 28783712449. The next prime is 28783712521. The reversal of 28783712511 is 11521738782.

28783712511 is a `hidden beast` number, since 28 + 7 + 8 + 371 + 251 + 1 = 666.

It is not a de Polignac number, because 28783712511 - 2¹³ = 28783704319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28783712521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1321096 + ... + 1342706.

It is an arithmetic number, because the mean of its divisors is an integer number (1754289264).

Almost surely, 2^28783712511 is an apocalyptic number.

28783712511 is a deficient number, since it is larger than the sum of its proper divisors (13319229825).

28783712511 is a wasteful number, since it uses less digits than its factorization.

28783712511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23483 (or 23480 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

It can be divided in two parts, 2878371 and 2511, that added together give a palindrome (2880882).

The spelling of 28783712511 in words is "twenty-eight billion, seven hundred eighty-three million, seven hundred twelve thousand, five hundred eleven".