451146415064521 has 4 divisors (see below), whose sum is σ = 492159725524944. Its totient is φ = 410133104604100.

The previous prime is 451146415064497. The next prime is 451146415064533. The reversal of 451146415064521 is 125460514641154.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 451146415064521 - 2⁷ = 451146415064393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451146415064621) 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, 20506655230195 + ... + 20506655230216.

It is an arithmetic number, because the mean of its divisors is an integer number (123039931381236).

Almost surely, 2^{451146415064521} is an apocalyptic number.

It is an amenable number.

451146415064521 is a deficient number, since it is larger than the sum of its proper divisors (41013310460423).

451146415064521 is a wasteful number, since it uses less digits than its factorization.

451146415064521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41013310460422.

The product of its (nonzero) digits is 2304000, while the sum is 49.

The spelling of 451146415064521 in words is "four hundred fifty-one trillion, one hundred forty-six billion, four hundred fifteen million, sixty-four thousand, five hundred twenty-one".