671622216572 has 12 divisors (see below), whose sum is σ = 1175356804440. Its totient is φ = 335805986736.

The previous prime is 671622216571. The next prime is 671622216619. The reversal of 671622216572 is 275612226176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671622216571) 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, 977363 + ... + 1516074.

It is an arithmetic number, because the mean of its divisors is an integer number (97946400370).

Almost surely, 2^671622216572 is an apocalyptic number.

It is an amenable number.

671622216572 is a deficient number, since it is larger than the sum of its proper divisors (503734587868).

671622216572 is a wasteful number, since it uses less digits than its factorization.

671622216572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560780 (or 2560778 counting only the distinct ones).

The product of its digits is 846720, while the sum is 47.

The spelling of 671622216572 in words is "six hundred seventy-one billion, six hundred twenty-two million, two hundred sixteen thousand, five hundred seventy-two".