209010998854650 has 48 divisors (see below), whose sum is σ = 518348170361664. Its totient is φ = 55736170318080.

The previous prime is 209010998854649. The next prime is 209010998854717. The reversal of 209010998854650 is 56458899010902.

It is a happy number.

It is a super-2 number, since 2×209010998854650² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146545762 + ... + 147965138.

It is an arithmetic number, because the mean of its divisors is an integer number (10798920215868).

Almost surely, 2^{209010998854650} is an apocalyptic number.

209010998854650 is an abundant number, since it is smaller than the sum of its proper divisors (309337171507014).

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

209010998854650 is a wasteful number, since it uses less digits than its factorization.

209010998854650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401095 (or 2401090 counting only the distinct ones).

The product of its (nonzero) digits is 55987200, while the sum is 66.

The spelling of 209010998854650 in words is "two hundred nine trillion, ten billion, nine hundred ninety-eight million, eight hundred fifty-four thousand, six hundred fifty".