11778951111 has 8 divisors (see below), whose sum is σ = 15715271424. Its totient is φ = 7847632440.

The previous prime is 11778951097. The next prime is 11778951127. The reversal of 11778951111 is 11115987711.

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

It is not a de Polignac number, because 11778951111 - 2²⁷ = 11644733383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11778951161) 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, 1244911 + ... + 1254336.

It is an arithmetic number, because the mean of its divisors is an integer number (1964408928).

Almost surely, 2^11778951111 is an apocalyptic number.

11778951111 is a deficient number, since it is larger than the sum of its proper divisors (3936320313).

11778951111 is a wasteful number, since it uses less digits than its factorization.

11778951111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2500821.

The product of its digits is 17640, while the sum is 42.

The spelling of 11778951111 in words is "eleven billion, seven hundred seventy-eight million, nine hundred fifty-one thousand, one hundred eleven".