11256012709 has 4 divisors (see below), whose sum is σ = 11273518816. Its totient is φ = 11238506604.

The previous prime is 11256012707. The next prime is 11256012773. The reversal of 11256012709 is 90721065211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11256012709 - 2¹ = 11256012707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11256012707) 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, 8752089 + ... + 8753374.

It is an arithmetic number, because the mean of its divisors is an integer number (2818379704).

Almost surely, 2^11256012709 is an apocalyptic number.

It is an amenable number.

11256012709 is a deficient number, since it is larger than the sum of its proper divisors (17506107).

11256012709 is an equidigital number, since it uses as much as digits as its factorization.

11256012709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17506106.

The product of its (nonzero) digits is 7560, while the sum is 34.

The spelling of 11256012709 in words is "eleven billion, two hundred fifty-six million, twelve thousand, seven hundred nine".