1440642140540 has 24 divisors (see below), whose sum is σ = 3082430544480. Its totient is φ = 565384084928.

The previous prime is 1440642140533. The next prime is 1440642140543. The reversal of 1440642140540 is 450412460441.

It is a super-2 number, since 2×1440642140540² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1440642140540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440642140543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679547120 + ... + 679549239.

It is an arithmetic number, because the mean of its divisors is an integer number (128434606020).

Almost surely, 2^{1440642140540} is an apocalyptic number.

1440642140540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440642140540 is an abundant number, since it is smaller than the sum of its proper divisors (1641788403940).

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

1440642140540 is a wasteful number, since it uses less digits than its factorization.

1440642140540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359096421 (or 1359096419 counting only the distinct ones).

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

The spelling of 1440642140540 in words is "one trillion, four hundred forty billion, six hundred forty-two million, one hundred forty thousand, five hundred forty".