11810989840 has 160 divisors (see below), whose sum is σ = 30014078976. Its totient is φ = 4296499200.

The previous prime is 11810989823. The next prime is 11810989859. The reversal of 11810989840 is 4898901811.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29453640 + ... + 29454040.

Almost surely, 2^11810989840 is an apocalyptic number.

11810989840 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 11810989840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15007039488).

11810989840 is an abundant number, since it is smaller than the sum of its proper divisors (18203089136).

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

11810989840 is a wasteful number, since it uses less digits than its factorization.

11810989840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 49.

The spelling of 11810989840 in words is "eleven billion, eight hundred ten million, nine hundred eighty-nine thousand, eight hundred forty".