423645565446 has 80 divisors (see below), whose sum is σ = 982353968640. Its totient is φ = 136298453760.

The previous prime is 423645565373. The next prime is 423645565451. The reversal of 423645565446 is 644565546324.

423645565446 is a `hidden beast` number, since 4 + 2 + 3 + 6 + 45 + 56 + 544 + 6 = 666.

It is a super-2 number, since 2×423645565446² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 423645565392 and 423645565401.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 15099451 + ... + 15127481.

It is an arithmetic number, because the mean of its divisors is an integer number (12279424608).

Almost surely, 2^423645565446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423645565446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (491176984320).

423645565446 is an abundant number, since it is smaller than the sum of its proper divisors (558708403194).

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

423645565446 is a wasteful number, since it uses less digits than its factorization.

423645565446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31291 (or 31282 counting only the distinct ones).

The product of its digits is 41472000, while the sum is 54.

The spelling of 423645565446 in words is "four hundred twenty-three billion, six hundred forty-five million, five hundred sixty-five thousand, four hundred forty-six".