11762642809 has 4 divisors (see below), whose sum is σ = 11763715216. Its totient is φ = 11761570404.

The previous prime is 11762642783. The next prime is 11762642897. The reversal of 11762642809 is 90824626711.

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 11762642809 - 2⁵ = 11762642777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11762642209) 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, 519579 + ... + 541744.

It is an arithmetic number, because the mean of its divisors is an integer number (2940928804).

Almost surely, 2^11762642809 is an apocalyptic number.

It is an amenable number.

11762642809 is a deficient number, since it is larger than the sum of its proper divisors (1072407).

11762642809 is a wasteful number, since it uses less digits than its factorization.

11762642809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072406.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 11762642809 in words is "eleven billion, seven hundred sixty-two million, six hundred forty-two thousand, eight hundred nine".