321678400802 has 32 divisors (see below), whose sum is σ = 530138364480. Its totient is φ = 145176771520.

The previous prime is 321678400783. The next prime is 321678400843. The reversal of 321678400802 is 208004876123.

It is a self number, because there is not a number n which added to its sum of digits gives 321678400802.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2508968 + ... + 2634060.

It is an arithmetic number, because the mean of its divisors is an integer number (16566823890).

Almost surely, 2^321678400802 is an apocalyptic number.

321678400802 is a deficient number, since it is larger than the sum of its proper divisors (208459963678).

321678400802 is a wasteful number, since it uses less digits than its factorization.

321678400802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125938.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 321678400802 in words is "three hundred twenty-one billion, six hundred seventy-eight million, four hundred thousand, eight hundred two".