11681042400 has 180 divisors, whose sum is σ = 42598726632. Its totient is φ = 3114927360.

The previous prime is 11681042369. The next prime is 11681042419. The reversal of 11681042400 is 424018611.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 25332 + ... + 154931.

Almost surely, 2^11681042400 is an apocalyptic number.

11681042400 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 11681042400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21299363316).

11681042400 is an abundant number, since it is smaller than the sum of its proper divisors (30917684232).

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

11681042400 is a wasteful number, since it uses less digits than its factorization.

11681042400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180295 (or 180273 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The spelling of 11681042400 in words is "eleven billion, six hundred eighty-one million, forty-two thousand, four hundred".