40234301622721 has 2 divisors, whose sum is σ = 40234301622722. Its totient is φ = 40234301622720.

The previous prime is 40234301622719. The next prime is 40234301622737. The reversal of 40234301622721 is 12722610343204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27475796293696 + 12758505329025 = 5241736^2 + 3571905^2 .

It is a cyclic number.

It is not a de Polignac number, because 40234301622721 - 2¹ = 40234301622719 is a prime.

Together with 40234301622719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40234301622121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20117150811360 + 20117150811361.

It is an arithmetic number, because the mean of its divisors is an integer number (20117150811361).

Almost surely, 2^{40234301622721} is an apocalyptic number.

It is an amenable number.

40234301622721 is a deficient number, since it is larger than the sum of its proper divisors (1).

40234301622721 is an equidigital number, since it uses as much as digits as its factorization.

40234301622721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 37.

Adding to 40234301622721 its reverse (12722610343204), we get a palindrome (52956911965925).

The spelling of 40234301622721 in words is "forty trillion, two hundred thirty-four billion, three hundred one million, six hundred twenty-two thousand, seven hundred twenty-one".