402398979839999 has 4 divisors (see below), whose sum is σ = 403268092107936. Its totient is φ = 401529867572064.

The previous prime is 402398979839981. The next prime is 402398979840007. The reversal of 402398979839999 is 999938979893204.

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 402398979839999 - 2⁸ = 402398979839743 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 (402398979839099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434556133274 + ... + 434556134199.

It is an arithmetic number, because the mean of its divisors is an integer number (100817023026984).

Almost surely, 2^{402398979839999} is an apocalyptic number.

402398979839999 is a deficient number, since it is larger than the sum of its proper divisors (869112267937).

402398979839999 is an equidigital number, since it uses as much as digits as its factorization.

402398979839999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869112267936.

The product of its (nonzero) digits is 154279448064, while the sum is 98.

The spelling of 402398979839999 in words is "four hundred two trillion, three hundred ninety-eight billion, nine hundred seventy-nine million, eight hundred thirty-nine thousand, nine hundred ninety-nine".