820880803042 has 16 divisors (see below), whose sum is σ = 1244557664640. Its totient is φ = 406038919888.

The previous prime is 820880803033. The next prime is 820880803049. The reversal of 820880803042 is 240308088028.

It is a self number, because there is not a number n which added to its sum of digits gives 820880803042.

It is not an unprimeable number, because it can be changed into a prime (820880803049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2513653 + ... + 2821384.

It is an arithmetic number, because the mean of its divisors is an integer number (77784854040).

Almost surely, 2^820880803042 is an apocalyptic number.

820880803042 is a deficient number, since it is larger than the sum of its proper divisors (423676861598).

820880803042 is a wasteful number, since it uses less digits than its factorization.

820880803042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5335865.

The product of its (nonzero) digits is 196608, while the sum is 43.

The spelling of 820880803042 in words is "eight hundred twenty billion, eight hundred eighty million, eight hundred three thousand, forty-two".