42251004665 has 16 divisors (see below), whose sum is σ = 52359237840. Its totient is φ = 32705544960.

The previous prime is 42251004659. The next prime is 42251004703. The reversal of 42251004665 is 56640015224.

It can be written as a sum of positive squares in 8 ways, for example, as 9442203241 + 32808801424 = 97171^2 + 181132^2 .

It is not a de Polignac number, because 42251004665 - 2¹⁴ = 42250988281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 597410 + ... + 664379.

It is an arithmetic number, because the mean of its divisors is an integer number (3272452365).

Almost surely, 2^42251004665 is an apocalyptic number.

It is an amenable number.

42251004665 is a deficient number, since it is larger than the sum of its proper divisors (10108233175).

42251004665 is a wasteful number, since it uses less digits than its factorization.

42251004665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262012.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 42251004665 its reverse (56640015224), we get a palindrome (98891019889).

The spelling of 42251004665 in words is "forty-two billion, two hundred fifty-one million, four thousand, six hundred sixty-five".