671818049352 has 40 divisors (see below), whose sum is σ = 1881712593750. Its totient is φ = 223939349568.

The previous prime is 671818049333. The next prime is 671818049359. The reversal of 671818049352 is 253940818176.

671818049352 is a `hidden beast` number, since 6 + 71 + 8 + 1 + 80 + 493 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 636794424036 + 35023625316 = 797994^2 + 187146^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (671818049359) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 518377477 + ... + 518378772.

It is a 1-persistent number, because it is pandigital, but 2⋅671818049352 = 1343636098704 is not.

Almost surely, 2^671818049352 is an apocalyptic number.

It is an amenable number.

671818049352 is an abundant number, since it is smaller than the sum of its proper divisors (1209894544398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671818049352 is a wasteful number, since it uses less digits than its factorization.

671818049352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036756267 (or 1036756254 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 671818049352 in words is "six hundred seventy-one billion, eight hundred eighteen million, forty-nine thousand, three hundred fifty-two".