451373721825 has 144 divisors (see below), whose sum is σ = 852117276480. Its totient is φ = 210149821440.

The previous prime is 451373721797. The next prime is 451373721829. The reversal of 451373721825 is 528127373154.

It is not a de Polignac number, because 451373721825 - 2⁵ = 451373721793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (451373721829) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 176523447 + ... + 176526003.

Almost surely, 2^451373721825 is an apocalyptic number.

It is an amenable number.

451373721825 is a deficient number, since it is larger than the sum of its proper divisors (400743554655).

451373721825 is a wasteful number, since it uses less digits than its factorization.

451373721825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348 (or 3330 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 48.

The spelling of 451373721825 in words is "four hundred fifty-one billion, three hundred seventy-three million, seven hundred twenty-one thousand, eight hundred twenty-five".