813577251164 has 12 divisors (see below), whose sum is σ = 1423845812088. Its totient is φ = 406764162000.

The previous prime is 813577251083. The next prime is 813577251187. The reversal of 813577251164 is 461152775318.

It is a happy number.

It is a super-2 number, since 2×813577251164² (a number of 25 digits) contains 22 as substring.

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, 6040967 + ... + 6174174.

It is an arithmetic number, because the mean of its divisors is an integer number (118653817674).

Almost surely, 2^813577251164 is an apocalyptic number.

It is an amenable number.

813577251164 is a deficient number, since it is larger than the sum of its proper divisors (610268560924).

813577251164 is a wasteful number, since it uses less digits than its factorization.

813577251164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12231796 (or 12231794 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 50.

The spelling of 813577251164 in words is "eight hundred thirteen billion, five hundred seventy-seven million, two hundred fifty-one thousand, one hundred sixty-four".