820640002402 has 32 divisors (see below), whose sum is σ = 1386299432448. Its totient is φ = 360955200000.

The previous prime is 820640002297. The next prime is 820640002471. The reversal of 820640002402 is 204200046028.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9437202 + ... + 9523762.

It is an arithmetic number, because the mean of its divisors is an integer number (43321857264).

Almost surely, 2^820640002402 is an apocalyptic number.

820640002402 is a deficient number, since it is larger than the sum of its proper divisors (565659430046).

820640002402 is a wasteful number, since it uses less digits than its factorization.

820640002402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100506.

The product of its (nonzero) digits is 6144, while the sum is 28.

The spelling of 820640002402 in words is "eight hundred twenty billion, six hundred forty million, two thousand, four hundred two".