445340423172 has 24 divisors (see below), whose sum is σ = 1041595902592. Its totient is φ = 148094200800.

The previous prime is 445340423137. The next prime is 445340423173. The reversal of 445340423172 is 271324043544.

It is a super-2 number, since 2×445340423172² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 445340423172.

It is not an unprimeable number, because it can be changed into a prime (445340423173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44070604 + ... + 44080707.

Almost surely, 2^445340423172 is an apocalyptic number.

It is an amenable number.

445340423172 is an abundant number, since it is smaller than the sum of its proper divisors (596255479420).

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

445340423172 is a wasteful number, since it uses less digits than its factorization.

445340423172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88151739 (or 88151737 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 39.

The spelling of 445340423172 in words is "four hundred forty-five billion, three hundred forty million, four hundred twenty-three thousand, one hundred seventy-two".