820266722272 has 24 divisors (see below), whose sum is σ = 1623015198000. Its totient is φ = 408072386304.

The previous prime is 820266722173. The next prime is 820266722309. The reversal of 820266722272 is 272227662028.

It is a congruent number.

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, 64398997 + ... + 64411732.

It is an arithmetic number, because the mean of its divisors is an integer number (67625633250).

Almost surely, 2^820266722272 is an apocalyptic number.

It is an amenable number.

820266722272 is a deficient number, since it is larger than the sum of its proper divisors (802748475728).

820266722272 is a wasteful number, since it uses less digits than its factorization.

820266722272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128810938 (or 128810930 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 46.

The spelling of 820266722272 in words is "eight hundred twenty billion, two hundred sixty-six million, seven hundred twenty-two thousand, two hundred seventy-two".