11418992640 has 396 divisors, whose sum is σ = 43511699322. Its totient is φ = 2768240640.

The previous prime is 11418992639. The next prime is 11418992657. The reversal of 11418992640 is 4629981411.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10277093376 + 1141899264 = 101376^2 + 33792^2 .

It is a tau number, because it is divible by the number of its divisors (396).

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

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1038090235 + ... + 1038090245.

Almost surely, 2^11418992640 is an apocalyptic number.

11418992640 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 11418992640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21755849661).

11418992640 is an abundant number, since it is smaller than the sum of its proper divisors (32092706682).

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

11418992640 is an frugal number, since it uses more digits than its factorization.

11418992640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 11418992640 in words is "eleven billion, four hundred eighteen million, nine hundred ninety-two thousand, six hundred forty".