445215243440 has 40 divisors (see below), whose sum is σ = 1129227756048. Its totient is φ = 161896451840.

The previous prime is 445215243437. The next prime is 445215243449. The reversal of 445215243440 is 44342512544.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×445215243440² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 445215243394 and 445215243403.

It is not an unprimeable number, because it can be changed into a prime (445215243449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252962327 + ... + 252964086.

Almost surely, 2^445215243440 is an apocalyptic number.

445215243440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

445215243440 is an abundant number, since it is smaller than the sum of its proper divisors (684012512608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

445215243440 is a wasteful number, since it uses less digits than its factorization.

445215243440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505926437 (or 505926431 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 38.

Adding to 445215243440 its reverse (44342512544), we get a palindrome (489557755984).

The spelling of 445215243440 in words is "four hundred forty-five billion, two hundred fifteen million, two hundred forty-three thousand, four hundred forty".