201720710512 has 80 divisors (see below), whose sum is σ = 396605544192. Its totient is φ = 99384929280.

The previous prime is 201720710507. The next prime is 201720710549. The reversal of 201720710512 is 215017027102.

It is a super-2 number, since 2×201720710512² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245103733 + ... + 245104555.

Almost surely, 2^201720710512 is an apocalyptic number.

It is an amenable number.

201720710512 is a deficient number, since it is larger than the sum of its proper divisors (194884833680).

201720710512 is a wasteful number, since it uses less digits than its factorization.

201720710512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646 (or 1640 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 28.

Adding to 201720710512 its reverse (215017027102), we get a palindrome (416737737614).

The spelling of 201720710512 in words is "two hundred one billion, seven hundred twenty million, seven hundred ten thousand, five hundred twelve".