1131405444440 has 64 divisors (see below), whose sum is σ = 2557978768800. Its totient is φ = 450377321472.

The previous prime is 1131405444431. The next prime is 1131405444443. The reversal of 1131405444440 is 444445041311.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131405444440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131405444443) 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, 7601051 + ... + 7748469.

Almost surely, 2^{1131405444440} is an apocalyptic number.

1131405444440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131405444440 is an abundant number, since it is smaller than the sum of its proper divisors (1426573324360).

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

1131405444440 is a wasteful number, since it uses less digits than its factorization.

1131405444440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148356 (or 148352 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 35.

The spelling of 1131405444440 in words is "one trillion, one hundred thirty-one billion, four hundred five million, four hundred forty-four thousand, four hundred forty".