451440243620123 has 4 divisors (see below), whose sum is σ = 453464639331648. Its totient is φ = 449415847908600.

The previous prime is 451440243620117. The next prime is 451440243620141. The reversal of 451440243620123 is 321026342044154.

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 451440243620123 - 2³⁶ = 451371524143387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (451440243620183) 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, 1012197855428 + ... + 1012197855873.

It is an arithmetic number, because the mean of its divisors is an integer number (113366159832912).

Almost surely, 2^{451440243620123} is an apocalyptic number.

451440243620123 is a deficient number, since it is larger than the sum of its proper divisors (2024395711525).

451440243620123 is a wasteful number, since it uses less digits than its factorization.

451440243620123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024395711524.

The product of its (nonzero) digits is 552960, while the sum is 41.

Adding to 451440243620123 its reverse (321026342044154), we get a palindrome (772466585664277).

The spelling of 451440243620123 in words is "four hundred fifty-one trillion, four hundred forty billion, two hundred forty-three million, six hundred twenty thousand, one hundred twenty-three".