11129970078 has 96 divisors (see below), whose sum is σ = 25642745856. Its totient is φ = 3616485408.

The previous prime is 11129970067. The next prime is 11129970079. The reversal of 11129970078 is 87007992111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11129970079) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6691875 + ... + 6693537.

It is an arithmetic number, because the mean of its divisors is an integer number (267111936).

Almost surely, 2^11129970078 is an apocalyptic number.

11129970078 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 11129970078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12821372928).

11129970078 is an abundant number, since it is smaller than the sum of its proper divisors (14512775778).

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

11129970078 is a wasteful number, since it uses less digits than its factorization.

11129970078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020 (or 2008 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 45.

The spelling of 11129970078 in words is "eleven billion, one hundred twenty-nine million, nine hundred seventy thousand, seventy-eight".