1544400453 has 4 divisors (see below), whose sum is σ = 2059200608. Its totient is φ = 1029600300.

The previous prime is 1544400433. The next prime is 1544400457. The reversal of 1544400453 is 3540044451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1544400453 - 2⁵ = 1544400421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1544400453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1544400457) 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, 257400073 + ... + 257400078.

It is an arithmetic number, because the mean of its divisors is an integer number (514800152).

Almost surely, 2^1544400453 is an apocalyptic number.

It is an amenable number.

1544400453 is a deficient number, since it is larger than the sum of its proper divisors (514800155).

1544400453 is an equidigital number, since it uses as much as digits as its factorization.

1544400453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514800154.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 1544400453 is about 39298.8607086770. The cubic root of 1544400453 is about 1155.8992273857.

The spelling of 1544400453 in words is "one billion, five hundred forty-four million, four hundred thousand, four hundred fifty-three".