201579227668 has 24 divisors (see below), whose sum is σ = 434170644992. Its totient is φ = 79745628384.

The previous prime is 201579227653. The next prime is 201579227699. The reversal of 201579227668 is 866722975102.

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, 276894180 + ... + 276894907.

Almost surely, 2^201579227668 is an apocalyptic number.

201579227668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

201579227668 is an abundant number, since it is smaller than the sum of its proper divisors (232591417324).

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

201579227668 is a wasteful number, since it uses less digits than its factorization.

201579227668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553789111 (or 553789109 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 201579227668 in words is "two hundred one billion, five hundred seventy-nine million, two hundred twenty-seven thousand, six hundred sixty-eight".