671815422452 has 12 divisors (see below), whose sum is σ = 1176299383140. Its totient is φ = 335729884416.

The previous prime is 671815422407. The next prime is 671815422457. The reversal of 671815422452 is 254224518176.

It can be written as a sum of positive squares in 2 ways, for example, as 565209254416 + 106606168036 = 751804^2 + 326506^2 .

It is a junction number, because it is equal to n+sod(n) for n = 671815422397 and 671815422406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671815422457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44448203 + ... + 44463314.

It is an arithmetic number, because the mean of its divisors is an integer number (98024948595).

Almost surely, 2^671815422452 is an apocalyptic number.

It is an amenable number.

671815422452 is a deficient number, since it is larger than the sum of its proper divisors (504483960688).

671815422452 is a wasteful number, since it uses less digits than its factorization.

671815422452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88913410 (or 88913408 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 47.

The spelling of 671815422452 in words is "six hundred seventy-one billion, eight hundred fifteen million, four hundred twenty-two thousand, four hundred fifty-two".