11778621132 has 24 divisors (see below), whose sum is σ = 28929947200. Its totient is φ = 3719564496.

The previous prime is 11778621079. The next prime is 11778621161. The reversal of 11778621132 is 23112687711.

It is a happy number.

It is a super-2 number, since 2×11778621132² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25830082 + ... + 25830537.

Almost surely, 2^11778621132 is an apocalyptic number.

11778621132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11778621132 is an abundant number, since it is smaller than the sum of its proper divisors (17151326068).

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

11778621132 is a wasteful number, since it uses less digits than its factorization.

11778621132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51660645 (or 51660643 counting only the distinct ones).

The product of its digits is 28224, while the sum is 39.

The spelling of 11778621132 in words is "eleven billion, seven hundred seventy-eight million, six hundred twenty-one thousand, one hundred thirty-two".