201672656 has 20 divisors (see below), whose sum is σ = 392369604. Its totient is φ = 100416000.

The previous prime is 201672619. The next prime is 201672689. The reversal of 201672656 is 656276102.

It can be written as a sum of positive squares in 2 ways, for example, as 169000000 + 32672656 = 13000^2 + 5716^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22295 + ... + 30006.

Almost surely, 2^201672656 is an apocalyptic number.

It is an amenable number.

201672656 is a deficient number, since it is larger than the sum of its proper divisors (190696948).

201672656 is a wasteful number, since it uses less digits than its factorization.

201672656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52550 (or 52544 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 201672656 is about 14201.1498126032. The cubic root of 201672656 is about 586.4293157175.

The spelling of 201672656 in words is "two hundred one million, six hundred seventy-two thousand, six hundred fifty-six".