10944399978 has 192 divisors, whose sum is σ = 26705023488. Its totient is φ = 3224033280.

The previous prime is 10944399967. The next prime is 10944399979. The reversal of 10944399978 is 87999344901.

10944399978 is a `hidden beast` number, since 10 + 9 + 443 + 99 + 97 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (10944399979) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 69709476 + ... + 69709632.

It is an arithmetic number, because the mean of its divisors is an integer number (139088664).

Almost surely, 2^10944399978 is an apocalyptic number.

10944399978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10944399978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13352511744).

10944399978 is an abundant number, since it is smaller than the sum of its proper divisors (15760623510).

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

10944399978 is a wasteful number, since it uses less digits than its factorization.

10944399978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 63.

The spelling of 10944399978 in words is "ten billion, nine hundred forty-four million, three hundred ninety-nine thousand, nine hundred seventy-eight".