42250697561 has 2 divisors, whose sum is σ = 42250697562. Its totient is φ = 42250697560.

The previous prime is 42250697519. The next prime is 42250697641. The reversal of 42250697561 is 16579605224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21179271961 + 21071425600 = 145531^2 + 145160^2 .

It is a cyclic number.

It is not a de Polignac number, because 42250697561 - 2¹⁴ = 42250681177 is a prime.

It is not a weakly prime, because it can be changed into another prime (42250667561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21125348780 + 21125348781.

It is an arithmetic number, because the mean of its divisors is an integer number (21125348781).

Almost surely, 2^42250697561 is an apocalyptic number.

It is an amenable number.

42250697561 is a deficient number, since it is larger than the sum of its proper divisors (1).

42250697561 is an equidigital number, since it uses as much as digits as its factorization.

42250697561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 42250697561 in words is "forty-two billion, two hundred fifty million, six hundred ninety-seven thousand, five hundred sixty-one".