11667774198 has 16 divisors (see below), whose sum is σ = 23878236096. Its totient is φ = 3798810120.

The previous prime is 11667774197. The next prime is 11667774211. The reversal of 11667774198 is 89147776611.

It is a happy number.

It is a super-2 number, since 2×11667774198² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11667774197) 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, 22611708 + ... + 22612223.

It is an arithmetic number, because the mean of its divisors is an integer number (1492389756).

Almost surely, 2^11667774198 is an apocalyptic number.

11667774198 is an abundant number, since it is smaller than the sum of its proper divisors (12210461898).

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

11667774198 is a wasteful number, since it uses less digits than its factorization.

11667774198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45223979.

The product of its digits is 3556224, while the sum is 57.

The spelling of 11667774198 in words is "eleven billion, six hundred sixty-seven million, seven hundred seventy-four thousand, one hundred ninety-eight".