451440243022423 has 4 divisors (see below), whose sum is σ = 451555318285848. Its totient is φ = 451325167759000.

The previous prime is 451440243022357. The next prime is 451440243022459. The reversal of 451440243022423 is 324220342044154.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 451440243022423 - 2²⁵ = 451440209467991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451440243022523) 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, 57537625828 + ... + 57537633673.

It is an arithmetic number, because the mean of its divisors is an integer number (112888829571462).

Almost surely, 2^{451440243022423} is an apocalyptic number.

451440243022423 is a deficient number, since it is larger than the sum of its proper divisors (115075263425).

451440243022423 is a wasteful number, since it uses less digits than its factorization.

451440243022423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115075263424.

The product of its (nonzero) digits is 737280, while the sum is 40.

Adding to 451440243022423 its reverse (324220342044154), we get a palindrome (775660585066577).

The spelling of 451440243022423 in words is "four hundred fifty-one trillion, four hundred forty billion, two hundred forty-three million, twenty-two thousand, four hundred twenty-three".