11949039900 has 864 divisors, whose sum is σ = 48356904960. Its totient is φ = 2405376000.

The previous prime is 11949039887. The next prime is 11949039901. The reversal of 11949039900 is 993094911.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11949039901) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 195885870 + ... + 195885930.

It is an arithmetic number, because the mean of its divisors is an integer number (55968640).

Almost surely, 2^11949039900 is an apocalyptic number.

11949039900 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 11949039900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24178452480).

11949039900 is an abundant number, since it is smaller than the sum of its proper divisors (36407865060).

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

11949039900 is a wasteful number, since it uses less digits than its factorization.

11949039900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The spelling of 11949039900 in words is "eleven billion, nine hundred forty-nine million, thirty-nine thousand, nine hundred".