820411291796 has 6 divisors (see below), whose sum is σ = 1435719760650. Its totient is φ = 410205645896.

The previous prime is 820411291771. The next prime is 820411291829. The reversal of 820411291796 is 697192114028.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 803558059396 + 16853232400 = 896414^2 + 129820^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102551411471 + ... + 102551411478.

It is an arithmetic number, because the mean of its divisors is an integer number (239286626775).

Almost surely, 2^820411291796 is an apocalyptic number.

It is an amenable number.

820411291796 is a deficient number, since it is larger than the sum of its proper divisors (615308468854).

820411291796 is a wasteful number, since it uses less digits than its factorization.

820411291796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205102822953 (or 205102822951 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 820411291796 in words is "eight hundred twenty billion, four hundred eleven million, two hundred ninety-one thousand, seven hundred ninety-six".