11999769840 has 120 divisors (see below), whose sum is σ = 41350084080. Its totient is φ = 3198580992.

The previous prime is 11999769839. The next prime is 11999769841. The reversal of 11999769840 is 4896799911.

It is an interprime number because it is at equal distance from previous prime (11999769839) and next prime (11999769841).

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11999769841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5089942 + ... + 5092298.

It is an arithmetic number, because the mean of its divisors is an integer number (344584034).

Almost surely, 2^11999769840 is an apocalyptic number.

11999769840 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 11999769840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20675042040).

11999769840 is an abundant number, since it is smaller than the sum of its proper divisors (29350314240).

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

11999769840 is an frugal number, since it uses more digits than its factorization.

11999769840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4736 (or 2367 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 63.

The spelling of 11999769840 in words is "eleven billion, nine hundred ninety-nine million, seven hundred sixty-nine thousand, eight hundred forty".