11744400640 has 72 divisors (see below), whose sum is σ = 32150321280. Its totient is φ = 4026648576.

The previous prime is 11744400617. The next prime is 11744400709. The reversal of 11744400640 is 4600444711.

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646420 + ... + 664339.

It is an arithmetic number, because the mean of its divisors is an integer number (446532240).

Almost surely, 2^11744400640 is an apocalyptic number.

11744400640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11744400640 is an abundant number, since it is smaller than the sum of its proper divisors (20405920640).

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

11744400640 is an equidigital number, since it uses as much as digits as its factorization.

11744400640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310787 (or 1310773 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The spelling of 11744400640 in words is "eleven billion, seven hundred forty-four million, four hundred thousand, six hundred forty".