671736461812 has 24 divisors (see below), whose sum is σ = 1266245456000. Its totient is φ = 309963498336.

The previous prime is 671736461807. The next prime is 671736461819. The reversal of 671736461812 is 218164637176.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 671736461812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671736461819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1194312 + ... + 1664287.

Almost surely, 2^671736461812 is an apocalyptic number.

It is an amenable number.

671736461812 is a deficient number, since it is larger than the sum of its proper divisors (594508994188).

671736461812 is a wasteful number, since it uses less digits than its factorization.

671736461812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863135 (or 2863133 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 52.

The spelling of 671736461812 in words is "six hundred seventy-one billion, seven hundred thirty-six million, four hundred sixty-one thousand, eight hundred twelve".