42589670521 has 2 divisors, whose sum is σ = 42589670522. Its totient is φ = 42589670520.

The previous prime is 42589670449. The next prime is 42589670527. The reversal of 42589670521 is 12507698524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32587470400 + 10002200121 = 180520^2 + 100011^2 .

It is a cyclic number.

It is not a de Polignac number, because 42589670521 - 2²⁵ = 42556116089 is a prime.

It is a super-2 number, since 2×42589670521² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42589670527) 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 as a sum of consecutive naturals, namely, 21294835260 + 21294835261.

It is an arithmetic number, because the mean of its divisors is an integer number (21294835261).

Almost surely, 2^42589670521 is an apocalyptic number.

It is an amenable number.

42589670521 is a deficient number, since it is larger than the sum of its proper divisors (1).

42589670521 is an equidigital number, since it uses as much as digits as its factorization.

42589670521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 42589670521 in words is "forty-two billion, five hundred eighty-nine million, six hundred seventy thousand, five hundred twenty-one".