11778142266 has 192 divisors, whose sum is σ = 30976598016. Its totient is φ = 3190387200.

The previous prime is 11778142223. The next prime is 11778142301. The reversal of 11778142266 is 66224187711.

It is a super-2 number, since 2×11778142266² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12928351 + ... + 12929261.

It is an arithmetic number, because the mean of its divisors is an integer number (161336448).

Almost surely, 2^11778142266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11778142266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15488299008).

11778142266 is an abundant number, since it is smaller than the sum of its proper divisors (19198455750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11778142266 is a wasteful number, since it uses less digits than its factorization.

11778142266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137 (or 1134 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The spelling of 11778142266 in words is "eleven billion, seven hundred seventy-eight million, one hundred forty-two thousand, two hundred sixty-six".