402421442399 has 4 divisors (see below), whose sum is σ = 402434015280. Its totient is φ = 402408869520.

The previous prime is 402421442393. The next prime is 402421442491. The reversal of 402421442399 is 993244124204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402421442399 - 2⁴ = 402421442383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402421442393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6238307 + ... + 6302484.

It is an arithmetic number, because the mean of its divisors is an integer number (100608503820).

Almost surely, 2^402421442399 is an apocalyptic number.

402421442399 is a deficient number, since it is larger than the sum of its proper divisors (12572881).

402421442399 is a wasteful number, since it uses less digits than its factorization.

402421442399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12572880.

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 402421442399 in words is "four hundred two billion, four hundred twenty-one million, four hundred forty-two thousand, three hundred ninety-nine".