402144443397 has 12 divisors (see below), whose sum is σ = 580885294860. Its totient is φ = 268091685888.

The previous prime is 402144443383. The next prime is 402144443413. The reversal of 402144443397 is 793344441204.

402144443397 is a `hidden beast` number, since 4 + 0 + 214 + 4 + 4 + 43 + 397 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 333651795876 + 68492647521 = 577626^2 + 261711^2 .

It is not a de Polignac number, because 402144443397 - 2²⁴ = 402127666181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402144441397) 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 in 11 ways as a sum of consecutive naturals, for example, 218053 + ... + 922949.

It is an arithmetic number, because the mean of its divisors is an integer number (48407107905).

Almost surely, 2^402144443397 is an apocalyptic number.

It is an amenable number.

402144443397 is a deficient number, since it is larger than the sum of its proper divisors (178740851463).

402144443397 is a wasteful number, since it uses less digits than its factorization.

402144443397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768292 (or 768289 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 45.

The spelling of 402144443397 in words is "four hundred two billion, one hundred forty-four million, four hundred forty-three thousand, three hundred ninety-seven".