11842256640 has 144 divisors (see below), whose sum is σ = 38212318368. Its totient is φ = 3125280768.

The previous prime is 11842256639. The next prime is 11842256641. The reversal of 11842256640 is 4665224811.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11842256639) and next prime (11842256641).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11842256641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356584 + ... + 388376.

It is an arithmetic number, because the mean of its divisors is an integer number (265363322).

Almost surely, 2^11842256640 is an apocalyptic number.

11842256640 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 11842256640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19106159184).

11842256640 is an abundant number, since it is smaller than the sum of its proper divisors (26370061728).

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

11842256640 is an equidigital number, since it uses as much as digits as its factorization.

11842256640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31914 (or 31900 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 11842256640 in words is "eleven billion, eight hundred forty-two million, two hundred fifty-six thousand, six hundred forty".