11667156781284 has 81 divisors (see below), whose sum is σ = 29573382137481. Its totient is φ = 3878347387680.

The previous prime is 11667156781229. The next prime is 11667156781307. The reversal of 11667156781284 is 48218765176611.

It is a happy number.

The square root of 11667156781284 is 3415722.

It is a perfect power (a square), and thus also a powerful number.

11667156781284 is a `hidden beast` number, since 1 + 1 + 6 + 67 + 1 + 567 + 8 + 1 + 2 + 8 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10042877902500 + 1624278878784 = 3169050^2 + 1274472^2 .

It is a super-2 number, since 2×11667156781284² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 11702263074 + ... + 11702264070.

Almost surely, 2^{11667156781284} is an apocalyptic number.

11667156781284 is the 3415722-nd square number.

It is an amenable number.

11667156781284 is an abundant number, since it is smaller than the sum of its proper divisors (17906225356197).

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

11667156781284 is an frugal number, since it uses more digits than its factorization.

11667156781284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3146 (or 1573 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 63.

The spelling of 11667156781284 in words is "eleven trillion, six hundred sixty-seven billion, one hundred fifty-six million, seven hundred eighty-one thousand, two hundred eighty-four".