672521612656 has 40 divisors (see below), whose sum is σ = 1319348056320. Its totient is φ = 332048619456.

The previous prime is 672521612617. The next prime is 672521612717. The reversal of 672521612656 is 656216125276.

672521612656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2644665 + ... + 2887783.

It is an arithmetic number, because the mean of its divisors is an integer number (32983701408).

Almost surely, 2^672521612656 is an apocalyptic number.

It is an amenable number.

672521612656 is a deficient number, since it is larger than the sum of its proper divisors (646826443664).

672521612656 is a wasteful number, since it uses less digits than its factorization.

672521612656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245293 (or 245287 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 49.

The spelling of 672521612656 in words is "six hundred seventy-two billion, five hundred twenty-one million, six hundred twelve thousand, six hundred fifty-six".