201657790938 has 8 divisors (see below), whose sum is σ = 403315581888. Its totient is φ = 67219263644.

The previous prime is 201657790921. The next prime is 201657791009. The reversal of 201657790938 is 839097756102.

It is a sphenic number, since it is the product of 3 distinct primes.

201657790938 is an admirable number.

It is a super-2 number, since 2×201657790938² (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, 16804815906 + ... + 16804815917.

It is an arithmetic number, because the mean of its divisors is an integer number (50414447736).

Almost surely, 2^201657790938 is an apocalyptic number.

201657790938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201657790938 is a wasteful number, since it uses less digits than its factorization.

201657790938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33609631828.

The product of its (nonzero) digits is 5715360, while the sum is 57.

The spelling of 201657790938 in words is "two hundred one billion, six hundred fifty-seven million, seven hundred ninety thousand, nine hundred thirty-eight".