11125791787 has 4 divisors (see below), whose sum is σ = 12137227416. Its totient is φ = 10114356160.

The previous prime is 11125791757. The next prime is 11125791793. The reversal of 11125791787 is 78719752111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11125791787 - 2⁷ = 11125791659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11125791787.

It is not an unprimeable number, because it can be changed into a prime (11125791737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505717798 + ... + 505717819.

It is an arithmetic number, because the mean of its divisors is an integer number (3034306854).

Almost surely, 2^11125791787 is an apocalyptic number.

11125791787 is a deficient number, since it is larger than the sum of its proper divisors (1011435629).

11125791787 is a wasteful number, since it uses less digits than its factorization.

11125791787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011435628.

The product of its digits is 246960, while the sum is 49.

The spelling of 11125791787 in words is "eleven billion, one hundred twenty-five million, seven hundred ninety-one thousand, seven hundred eighty-seven".