402144331279 has 2 divisors, whose sum is σ = 402144331280. Its totient is φ = 402144331278.

The previous prime is 402144331271. The next prime is 402144331291. The reversal of 402144331279 is 972133441204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402144331279 - 2³ = 402144331271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402144331271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201072165639 + 201072165640.

It is an arithmetic number, because the mean of its divisors is an integer number (201072165640).

Almost surely, 2^402144331279 is an apocalyptic number.

402144331279 is a deficient number, since it is larger than the sum of its proper divisors (1).

402144331279 is an equidigital number, since it uses as much as digits as its factorization.

402144331279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 402144331279 in words is "four hundred two billion, one hundred forty-four million, three hundred thirty-one thousand, two hundred seventy-nine".