201723717928 has 16 divisors (see below), whose sum is σ = 378246677760. Its totient is φ = 100857937200.

The previous prime is 201723717907. The next prime is 201723717967. The reversal of 201723717928 is 829717327102.

It is a super-2 number, since 2×201723717928² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265558 + ... + 688453.

It is an arithmetic number, because the mean of its divisors is an integer number (23640417360).

Almost surely, 2^201723717928 is an apocalyptic number.

It is an amenable number.

201723717928 is a deficient number, since it is larger than the sum of its proper divisors (176522959832).

201723717928 is a wasteful number, since it uses less digits than its factorization.

201723717928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980448 (or 980444 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 49.

The spelling of 201723717928 in words is "two hundred one billion, seven hundred twenty-three million, seven hundred seventeen thousand, nine hundred twenty-eight".