72422042636401 has 2 divisors, whose sum is σ = 72422042636402. Its totient is φ = 72422042636400.

The previous prime is 72422042636399. The next prime is 72422042636423. The reversal of 72422042636401 is 10463624022427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47896420684176 + 24525621952225 = 6920724^2 + 4952335^2 .

It is a cyclic number.

It is not a de Polignac number, because 72422042636401 - 2¹ = 72422042636399 is a prime.

Together with 72422042636399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72422042636441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36211021318200 + 36211021318201.

It is an arithmetic number, because the mean of its divisors is an integer number (36211021318201).

Almost surely, 2^{72422042636401} is an apocalyptic number.

It is an amenable number.

72422042636401 is a deficient number, since it is larger than the sum of its proper divisors (1).

72422042636401 is an equidigital number, since it uses as much as digits as its factorization.

72422042636401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 43.

Adding to 72422042636401 its reverse (10463624022427), we get a palindrome (82885666658828).

The spelling of 72422042636401 in words is "seventy-two trillion, four hundred twenty-two billion, forty-two million, six hundred thirty-six thousand, four hundred one".