671565578028008 has 16 divisors (see below), whose sum is σ = 1293217498230180. Its totient is φ = 326707578499968.

The previous prime is 671565578027989. The next prime is 671565578028049. The reversal of 671565578028008 is 800820875565176.

It can be written as a sum of positive squares in 2 ways, for example, as 661336212065764 + 10229365962244 = 25716458^2 + 3198338^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1134401313941 + ... + 1134401314532.

Almost surely, 2^{671565578028008} is an apocalyptic number.

It is an amenable number.

671565578028008 is a deficient number, since it is larger than the sum of its proper divisors (621651920202172).

671565578028008 is a wasteful number, since it uses less digits than its factorization.

671565578028008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268802628516 (or 2268802628512 counting only the distinct ones).

The product of its (nonzero) digits is 225792000, while the sum is 68.

The spelling of 671565578028008 in words is "six hundred seventy-one trillion, five hundred sixty-five billion, five hundred seventy-eight million, twenty-eight thousand, eight".