201664056 has 32 divisors (see below), whose sum is σ = 549993600. Its totient is φ = 61110240.

The previous prime is 201664039. The next prime is 201664087. The reversal of 201664056 is 650466102.

It is a super-2 number, since 2×201664056² = 81336782964742272, which 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 7 ways as a sum of consecutive naturals, for example, 381676 + ... + 382203.

It is an arithmetic number, because the mean of its divisors is an integer number (17187300).

Almost surely, 2^201664056 is an apocalyptic number.

It is an amenable number.

201664056 is an abundant number, since it is smaller than the sum of its proper divisors (348329544).

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

201664056 is a wasteful number, since it uses less digits than its factorization.

201664056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763899 (or 763895 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 201664056 is about 14200.8470169916. The cubic root of 201664056 is about 586.4209798266.

The spelling of 201664056 in words is "two hundred one million, six hundred sixty-four thousand, fifty-six".