42663647252 has 24 divisors (see below), whose sum is σ = 75707131752. Its totient is φ = 21033216000.

The previous prime is 42663647251. The next prime is 42663647263. The reversal of 42663647252 is 25274636624.

It can be written as a sum of positive squares in 4 ways, for example, as 28024099216 + 14639548036 = 167404^2 + 120994^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42663647197 and 42663647206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42663647251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025252 + ... + 1066052.

It is an arithmetic number, because the mean of its divisors is an integer number (3154463823).

Almost surely, 2^42663647252 is an apocalyptic number.

It is an amenable number.

42663647252 is a deficient number, since it is larger than the sum of its proper divisors (33043484500).

42663647252 is a wasteful number, since it uses less digits than its factorization.

42663647252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44459 (or 44457 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 47.

The spelling of 42663647252 in words is "forty-two billion, six hundred sixty-three million, six hundred forty-seven thousand, two hundred fifty-two".