209048148568 has 16 divisors (see below), whose sum is σ = 447960318480. Its totient is φ = 89592063648.

The previous prime is 209048148559. The next prime is 209048148599. The reversal of 209048148568 is 865841840902.

It is a super-2 number, since 2×209048148568² (a number of 23 digits) 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 3 ways as a sum of consecutive naturals, for example, 1866501271 + ... + 1866501382.

It is an arithmetic number, because the mean of its divisors is an integer number (27997519905).

Almost surely, 2^209048148568 is an apocalyptic number.

209048148568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

209048148568 is an abundant number, since it is smaller than the sum of its proper divisors (238912169912).

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

209048148568 is a wasteful number, since it uses less digits than its factorization.

209048148568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3733002666 (or 3733002662 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 55.

The spelling of 209048148568 in words is "two hundred nine billion, forty-eight million, one hundred forty-eight thousand, five hundred sixty-eight".