209420680608 has 48 divisors (see below), whose sum is σ = 610810320960. Its totient is φ = 69806893248.

The previous prime is 209420680583. The next prime is 209420680657. The reversal of 209420680608 is 806086024902.

It is a tau number, because it is divible by the number of its divisors (48).

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, 121191660 + ... + 121193387.

It is an arithmetic number, because the mean of its divisors is an integer number (12725215020).

Almost surely, 2^209420680608 is an apocalyptic number.

It is an amenable number.

209420680608 is an abundant number, since it is smaller than the sum of its proper divisors (401389640352).

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

209420680608 is a wasteful number, since it uses less digits than its factorization.

209420680608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242385066 (or 242385052 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 209420680608 in words is "two hundred nine billion, four hundred twenty million, six hundred eighty thousand, six hundred eight".