1440020453451 has 8 divisors (see below), whose sum is σ = 1920072714960. Its totient is φ = 959990913792.

The previous prime is 1440020453357. The next prime is 1440020453461. The reversal of 1440020453451 is 1543540200441.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1440020453451 - 2¹⁰ = 1440020452427 is a prime.

It is a super-3 number, since 3×1440020453451³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1440020453461) 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, 5532030 + ... + 5786483.

It is an arithmetic number, because the mean of its divisors is an integer number (240009089370).

Almost surely, 2^{1440020453451} is an apocalyptic number.

1440020453451 is a deficient number, since it is larger than the sum of its proper divisors (480052261509).

1440020453451 is a wasteful number, since it uses less digits than its factorization.

1440020453451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11360925.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 1440020453451 its reverse (1543540200441), we get a palindrome (2983560653892).

The spelling of 1440020453451 in words is "one trillion, four hundred forty billion, twenty million, four hundred fifty-three thousand, four hundred fifty-one".