402268678639 has 2 divisors, whose sum is σ = 402268678640. Its totient is φ = 402268678638.

The previous prime is 402268678583. The next prime is 402268678711. The reversal of 402268678639 is 936876862204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402268678639 - 2¹¹ = 402268676591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402268618639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201134339319 + 201134339320.

It is an arithmetic number, because the mean of its divisors is an integer number (201134339320).

Almost surely, 2^402268678639 is an apocalyptic number.

402268678639 is a deficient number, since it is larger than the sum of its proper divisors (1).

402268678639 is an equidigital number, since it uses as much as digits as its factorization.

402268678639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41803776, while the sum is 61.

The spelling of 402268678639 in words is "four hundred two billion, two hundred sixty-eight million, six hundred seventy-eight thousand, six hundred thirty-nine".