401572104161 has 2 divisors, whose sum is σ = 401572104162. Its totient is φ = 401572104160.

The previous prime is 401572104121. The next prime is 401572104163. The reversal of 401572104161 is 161401275104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238905888400 + 162666215761 = 488780^2 + 403319^2 .

It is a cyclic number.

It is not a de Polignac number, because 401572104161 - 2⁶ = 401572104097 is a prime.

It is a super-2 number, since 2×401572104161² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 401572104163, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (401572104163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200786052080 + 200786052081.

It is an arithmetic number, because the mean of its divisors is an integer number (200786052081).

Almost surely, 2^401572104161 is an apocalyptic number.

It is an amenable number.

401572104161 is a deficient number, since it is larger than the sum of its proper divisors (1).

401572104161 is an equidigital number, since it uses as much as digits as its factorization.

401572104161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 32.

Adding to 401572104161 its reverse (161401275104), we get a palindrome (562973379265).

The spelling of 401572104161 in words is "four hundred one billion, five hundred seventy-two million, one hundred four thousand, one hundred sixty-one".