1440365121540 has 72 divisors (see below), whose sum is σ = 4370341248000. Its totient is φ = 383988907584.

The previous prime is 1440365121529. The next prime is 1440365121541. The reversal of 1440365121540 is 451215630441.

1440365121540 is a `hidden beast` number, since 1 + 4 + 40 + 3 + 6 + 51 + 21 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1440365121495 and 1440365121504.

It is not an unprimeable number, because it can be changed into a prime (1440365121541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 489540 + ... + 1766459.

It is an arithmetic number, because the mean of its divisors is an integer number (60699184000).

Almost surely, 2^{1440365121540} is an apocalyptic number.

1440365121540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440365121540 is an abundant number, since it is smaller than the sum of its proper divisors (2929976126460).

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

1440365121540 is a wasteful number, since it uses less digits than its factorization.

1440365121540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2259561 (or 2259556 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 1440365121540 in words is "one trillion, four hundred forty billion, three hundred sixty-five million, one hundred twenty-one thousand, five hundred forty".