11979001378 has 32 divisors (see below), whose sum is σ = 18623010816. Its totient is φ = 5774519808.

The previous prime is 11979001373. The next prime is 11979001403. The reversal of 11979001378 is 87310097911.

It is a super-4 number, since 4×11979001378⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is not an unprimeable number, because it can be changed into a prime (11979001373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4618450 + ... + 4621042.

It is an arithmetic number, because the mean of its divisors is an integer number (581969088).

Almost surely, 2^11979001378 is an apocalyptic number.

11979001378 is a deficient number, since it is larger than the sum of its proper divisors (6644009438).

11979001378 is a wasteful number, since it uses less digits than its factorization.

11979001378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3178.

The product of its (nonzero) digits is 95256, while the sum is 46.

The spelling of 11979001378 in words is "eleven billion, nine hundred seventy-nine million, one thousand, three hundred seventy-eight".