820355553028 has 24 divisors (see below), whose sum is σ = 1566292339584. Its totient is φ = 372851028000.

The previous prime is 820355553023. The next prime is 820355553091.

820355553028 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (820355553023) 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, 505900 + ... + 1377187.

It is an arithmetic number, because the mean of its divisors is an integer number (65262180816).

Almost surely, 2^820355553028 is an apocalyptic number.

It is an amenable number.

820355553028 is a deficient number, since it is larger than the sum of its proper divisors (745936786556).

820355553028 is a wasteful number, since it uses less digits than its factorization.

820355553028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893003 (or 1893001 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 46.

The spelling of 820355553028 in words is "eight hundred twenty billion, three hundred fifty-five million, five hundred fifty-three thousand, twenty-eight".