11919691911 has 8 divisors (see below), whose sum is σ = 16440954480. Its totient is φ = 7672445312.

The previous prime is 11919691897. The next prime is 11919691951.

11919691911 is nontrivially palindromic in base 10.

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 11919691911 - 2¹³ = 11919683719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11919691951) 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, 68503890 + ... + 68504063.

It is an arithmetic number, because the mean of its divisors is an integer number (2055119310).

Almost surely, 2^11919691911 is an apocalyptic number.

11919691911 is a deficient number, since it is larger than the sum of its proper divisors (4521262569).

11919691911 is a wasteful number, since it uses less digits than its factorization.

11919691911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137007985.

The product of its digits is 39366, while the sum is 48.

The spelling of 11919691911 in words is "eleven billion, nine hundred nineteen million, six hundred ninety-one thousand, nine hundred eleven".