11749887978 has 8 divisors (see below), whose sum is σ = 23499775968. Its totient is φ = 3916629324.

The previous prime is 11749887923. The next prime is 11749887991. The reversal of 11749887978 is 87978894711.

It is a sphenic number, since it is the product of 3 distinct primes.

11749887978 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 979157326 + ... + 979157337.

It is an arithmetic number, because the mean of its divisors is an integer number (2937471996).

Almost surely, 2^11749887978 is an apocalyptic number.

11749887978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11749887978 is a wasteful number, since it uses less digits than its factorization.

11749887978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958314668.

The product of its digits is 56899584, while the sum is 69.

The spelling of 11749887978 in words is "eleven billion, seven hundred forty-nine million, eight hundred eighty-seven thousand, nine hundred seventy-eight".