445135323404521 has 4 divisors (see below), whose sum is σ = 459494527385344. Its totient is φ = 430776119423700.

The previous prime is 445135323404477. The next prime is 445135323404531. The reversal of 445135323404521 is 125404323531544.

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 a de Polignac number, because none of the positive numbers 2^k-445135323404521 is a prime.

It is a super-2 number, since 2×445135323404521² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445135323404531) 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, 7179601990365 + ... + 7179601990426.

It is an arithmetic number, because the mean of its divisors is an integer number (114873631846336).

Almost surely, 2^{445135323404521} is an apocalyptic number.

It is an amenable number.

445135323404521 is a deficient number, since it is larger than the sum of its proper divisors (14359203980823).

445135323404521 is a wasteful number, since it uses less digits than its factorization.

445135323404521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14359203980822.

The product of its (nonzero) digits is 3456000, while the sum is 46.

The spelling of 445135323404521 in words is "four hundred forty-five trillion, one hundred thirty-five billion, three hundred twenty-three million, four hundred four thousand, five hundred twenty-one".