209400900626 has 8 divisors (see below), whose sum is σ = 316028353584. Its totient is φ = 104058116100.

The previous prime is 209400900557. The next prime is 209400900671. The reversal of 209400900626 is 626009004902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 209400900626.

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, 321166700 + ... + 321167351.

It is an arithmetic number, because the mean of its divisors is an integer number (39503544198).

Almost surely, 2^209400900626 is an apocalyptic number.

209400900626 is a deficient number, since it is larger than the sum of its proper divisors (106627452958).

209400900626 is a wasteful number, since it uses less digits than its factorization.

209400900626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642334216.

The product of its (nonzero) digits is 46656, while the sum is 38.

The spelling of 209400900626 in words is "two hundred nine billion, four hundred million, nine hundred thousand, six hundred twenty-six".