400433120161 has 2 divisors, whose sum is σ = 400433120162. Its totient is φ = 400433120160.

The previous prime is 400433120137. The next prime is 400433120173. The reversal of 400433120161 is 161021334004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 328672890000 + 71760230161 = 573300^2 + 267881^2 .

It is a cyclic number.

It is not a de Polignac number, because 400433120161 - 2¹⁵ = 400433087393 is a prime.

It is not a weakly prime, because it can be changed into another prime (400433121161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200216560080 + 200216560081.

It is an arithmetic number, because the mean of its divisors is an integer number (200216560081).

Almost surely, 2^400433120161 is an apocalyptic number.

It is an amenable number.

400433120161 is a deficient number, since it is larger than the sum of its proper divisors (1).

400433120161 is an equidigital number, since it uses as much as digits as its factorization.

400433120161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 400433120161 its reverse (161021334004), we get a palindrome (561454454165).

The spelling of 400433120161 in words is "four hundred billion, four hundred thirty-three million, one hundred twenty thousand, one hundred sixty-one".