11951663794 has 12 divisors (see below), whose sum is σ = 20854433934. Its totient is φ = 5122141584.

The previous prime is 11951663791. The next prime is 11951663809. The reversal of 11951663794 is 49736615911.

It can be written as a sum of positive squares in only one way, i.e., 6928398169 + 5023265625 = 83237^2 + 70875^2 .

It is not an unprimeable number, because it can be changed into a prime (11951663791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60977779 + ... + 60977974.

Almost surely, 2^11951663794 is an apocalyptic number.

11951663794 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

11951663794 is a deficient number, since it is larger than the sum of its proper divisors (8902770140).

11951663794 is a wasteful number, since it uses less digits than its factorization.

11951663794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121955769 (or 121955762 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 52.

The spelling of 11951663794 in words is "eleven billion, nine hundred fifty-one million, six hundred sixty-three thousand, seven hundred ninety-four".