11311544240 has 20 divisors (see below), whose sum is σ = 26299340544. Its totient is φ = 4524617664.

The previous prime is 11311544171. The next prime is 11311544249. The reversal of 11311544240 is 4244511311.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (11311544249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70697072 + ... + 70697231.

Almost surely, 2^11311544240 is an apocalyptic number.

11311544240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11311544240 is an abundant number, since it is smaller than the sum of its proper divisors (14987796304).

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

11311544240 is a wasteful number, since it uses less digits than its factorization.

11311544240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141394316 (or 141394310 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The spelling of 11311544240 in words is "eleven billion, three hundred eleven million, five hundred forty-four thousand, two hundred forty".