11999998080 has 1152 divisors, whose sum is σ = 53140192560. Its totient is φ = 2477260800.

The previous prime is 11999998067. The next prime is 11999998091. The reversal of 11999998080 is 8089999911.

It can be written as a sum of positive squares in 8 ways, for example, as 904325184 + 11095672896 = 30072^2 + 105336^2 .

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 11999997999 and 11999998017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 196721250 + ... + 196721310.

Almost surely, 2^11999998080 is an apocalyptic number.

11999998080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11999998080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26570096280).

11999998080 is an abundant number, since it is smaller than the sum of its proper divisors (41140194480).

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

11999998080 is a wasteful number, since it uses less digits than its factorization.

11999998080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 63.

The spelling of 11999998080 in words is "eleven billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, eighty".