806072890820 has 12 divisors (see below), whose sum is σ = 1692753070764. Its totient is φ = 322429156320.

The previous prime is 806072890807. The next prime is 806072890837. The reversal of 806072890820 is 28098270608.

It can be written as a sum of positive squares in 2 ways, for example, as 540495513856 + 265577376964 = 735184^2 + 515342^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20151822251 + ... + 20151822290.

It is an arithmetic number, because the mean of its divisors is an integer number (141062755897).

Almost surely, 2^806072890820 is an apocalyptic number.

It is an amenable number.

806072890820 is an abundant number, since it is smaller than the sum of its proper divisors (886680179944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

806072890820 is a wasteful number, since it uses less digits than its factorization.

806072890820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40303644550 (or 40303644548 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 806072890820 in words is "eight hundred six billion, seventy-two million, eight hundred ninety thousand, eight hundred twenty".