201657790937 has 12 divisors (see below), whose sum is σ = 204391599780. Its totient is φ = 198959852448.

The previous prime is 201657790921. The next prime is 201657791009. The reversal of 201657790937 is 739097756102.

It can be written as a sum of positive squares in 2 ways, for example, as 72675533056 + 128982257881 = 269584^2 + 359141^2 .

It is not a de Polignac number, because 201657790937 - 2⁴ = 201657790921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201657720937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5195639 + ... + 5234307.

It is an arithmetic number, because the mean of its divisors is an integer number (17032633315).

Almost surely, 2^201657790937 is an apocalyptic number.

It is an amenable number.

201657790937 is a deficient number, since it is larger than the sum of its proper divisors (2733808843).

201657790937 is an frugal number, since it uses more digits than its factorization.

201657790937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39592 (or 39509 counting only the distinct ones).

The product of its (nonzero) digits is 5000940, while the sum is 56.

The spelling of 201657790937 in words is "two hundred one billion, six hundred fifty-seven million, seven hundred ninety thousand, nine hundred thirty-seven".