40401320429 has 2 divisors, whose sum is σ = 40401320430. Its totient is φ = 40401320428.

The previous prime is 40401320411. The next prime is 40401320483. The reversal of 40401320429 is 92402310404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39190141225 + 1211179204 = 197965^2 + 34802^2 .

It is a cyclic number.

It is not a de Polignac number, because 40401320429 - 2²⁰ = 40400271853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40401320129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20200660214 + 20200660215.

It is an arithmetic number, because the mean of its divisors is an integer number (20200660215).

Almost surely, 2^40401320429 is an apocalyptic number.

It is an amenable number.

40401320429 is a deficient number, since it is larger than the sum of its proper divisors (1).

40401320429 is an equidigital number, since it uses as much as digits as its factorization.

40401320429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 40401320429 in words is "forty billion, four hundred one million, three hundred twenty thousand, four hundred twenty-nine".