402440423041 has 2 divisors, whose sum is σ = 402440423042. Its totient is φ = 402440423040.

The previous prime is 402440423029. The next prime is 402440423069. The reversal of 402440423041 is 140324044204.

It is an a-pointer prime, because the next prime (402440423069) can be obtained adding 402440423041 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312560383041 + 89880040000 = 559071^2 + 299800^2 .

It is a cyclic number.

It is not a de Polignac number, because 402440423041 - 2²⁵ = 402406868609 is a prime.

It is not a weakly prime, because it can be changed into another prime (402440403041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201220211520 + 201220211521.

It is an arithmetic number, because the mean of its divisors is an integer number (201220211521).

Almost surely, 2^402440423041 is an apocalyptic number.

It is an amenable number.

402440423041 is a deficient number, since it is larger than the sum of its proper divisors (1).

402440423041 is an equidigital number, since it uses as much as digits as its factorization.

402440423041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 402440423041 its reverse (140324044204), we get a palindrome (542764467245).

The spelling of 402440423041 in words is "four hundred two billion, four hundred forty million, four hundred twenty-three thousand, forty-one".