42502023709 has 2 divisors, whose sum is σ = 42502023710. Its totient is φ = 42502023708.

The previous prime is 42502023671. The next prime is 42502023737. The reversal of 42502023709 is 90732020524.

It is a happy number.

42502023709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28572831225 + 13929192484 = 169035^2 + 118022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42502023709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42502023749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21251011854 + 21251011855.

It is an arithmetic number, because the mean of its divisors is an integer number (21251011855).

Almost surely, 2^42502023709 is an apocalyptic number.

It is an amenable number.

42502023709 is a deficient number, since it is larger than the sum of its proper divisors (1).

42502023709 is an equidigital number, since it uses as much as digits as its factorization.

42502023709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 42502023709 in words is "forty-two billion, five hundred two million, twenty-three thousand, seven hundred nine".