11905511879 has 8 divisors (see below), whose sum is σ = 11949922320. Its totient is φ = 11861176896.

The previous prime is 11905511857. The next prime is 11905511911. The reversal of 11905511879 is 97811550911.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11905511879 - 2³² = 7610544583 is a prime.

It is a super-2 number, since 2×11905511879² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11905514879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307712 + ... + 344234.

It is an arithmetic number, because the mean of its divisors is an integer number (1493740290).

Almost surely, 2^11905511879 is an apocalyptic number.

11905511879 is a deficient number, since it is larger than the sum of its proper divisors (44410441).

11905511879 is an equidigital number, since it uses as much as digits as its factorization.

11905511879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37729.

The product of its (nonzero) digits is 113400, while the sum is 47.

The spelling of 11905511879 in words is "eleven billion, nine hundred five million, five hundred eleven thousand, eight hundred seventy-nine".