250741650721 has 2 divisors, whose sum is σ = 250741650722. Its totient is φ = 250741650720.

The previous prime is 250741650707. The next prime is 250741650737. The reversal of 250741650721 is 127056147052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127048760721 + 123692890000 = 356439^2 + 351700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-250741650721 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (250741650421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125370825360 + 125370825361.

It is an arithmetic number, because the mean of its divisors is an integer number (125370825361).

Almost surely, 2^250741650721 is an apocalyptic number.

It is an amenable number.

250741650721 is a deficient number, since it is larger than the sum of its proper divisors (1).

250741650721 is an equidigital number, since it uses as much as digits as its factorization.

250741650721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117600, while the sum is 40.

Adding to 250741650721 its reverse (127056147052), we get a palindrome (377797797773).

The spelling of 250741650721 in words is "two hundred fifty billion, seven hundred forty-one million, six hundred fifty thousand, seven hundred twenty-one".