820090777402 has 16 divisors (see below), whose sum is σ = 1334874717792. Its totient is φ = 375614094960.

The previous prime is 820090777399. The next prime is 820090777433. The reversal of 820090777402 is 204777090028.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120385728 + ... + 120392539.

It is an arithmetic number, because the mean of its divisors is an integer number (83429669862).

Almost surely, 2^820090777402 is an apocalyptic number.

820090777402 is a deficient number, since it is larger than the sum of its proper divisors (514783940390).

820090777402 is a wasteful number, since it uses less digits than its factorization.

820090777402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240778413.

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 820090777402 in words is "eight hundred twenty billion, ninety million, seven hundred seventy-seven thousand, four hundred two".