451414444421 has 4 divisors (see below), whose sum is σ = 453287533644. Its totient is φ = 449541355200.

The previous prime is 451414444363. The next prime is 451414444447. The reversal of 451414444421 is 124444414154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124444414154 = 2 ⋅62222207077.

It can be written as a sum of positive squares in 2 ways, for example, as 385747819396 + 65666625025 = 621086^2 + 256255^2 .

It is a cyclic number.

It is not a de Polignac number, because 451414444421 - 2²⁶ = 451347335557 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 (451414444451) 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, 936544250 + ... + 936544731.

It is an arithmetic number, because the mean of its divisors is an integer number (113321883411).

Almost surely, 2^451414444421 is an apocalyptic number.

It is an amenable number.

451414444421 is a deficient number, since it is larger than the sum of its proper divisors (1873089223).

451414444421 is a wasteful number, since it uses less digits than its factorization.

451414444421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873089222.

The product of its digits is 163840, while the sum is 38.

Adding to 451414444421 its reverse (124444414154), we get a palindrome (575858858575).

The spelling of 451414444421 in words is "four hundred fifty-one billion, four hundred fourteen million, four hundred forty-four thousand, four hundred twenty-one".