201321757688 has 16 divisors (see below), whose sum is σ = 389655015360. Its totient is φ = 97413753600.

The previous prime is 201321757687. The next prime is 201321757699. The reversal of 201321757688 is 886757123102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201321757687) 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, 405890393 + ... + 405890888.

It is an arithmetic number, because the mean of its divisors is an integer number (24353438460).

Almost surely, 2^201321757688 is an apocalyptic number.

It is an amenable number.

201321757688 is a deficient number, since it is larger than the sum of its proper divisors (188333257672).

201321757688 is a wasteful number, since it uses less digits than its factorization.

201321757688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811781318 (or 811781314 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 201321757688 in words is "two hundred one billion, three hundred twenty-one million, seven hundred fifty-seven thousand, six hundred eighty-eight".