820574720044 has 6 divisors (see below), whose sum is σ = 1436005760084. Its totient is φ = 410287360020.

The previous prime is 820574720041. The next prime is 820574720057. The reversal of 820574720044 is 440027475028.

It is not an unprimeable number, because it can be changed into a prime (820574720041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102571840002 + ... + 102571840009.

Almost surely, 2^820574720044 is an apocalyptic number.

It is an amenable number.

820574720044 is a deficient number, since it is larger than the sum of its proper divisors (615431040040).

820574720044 is a wasteful number, since it uses less digits than its factorization.

820574720044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205143680015 (or 205143680013 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 43.

The spelling of 820574720044 in words is "eight hundred twenty billion, five hundred seventy-four million, seven hundred twenty thousand, forty-four".