209180935056 has 20 divisors (see below), whose sum is σ = 540384082352. Its totient is φ = 69726978336.

The previous prime is 209180935027. The next prime is 209180935109. The reversal of 209180935056 is 650539081902.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 4357936147 = 209180935056 / (2 + 0 + 9 + 1 + 8 + 0 + 9 + 3 + 5 + 0 + 5 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 209180934996 and 209180935014.

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, 2178968026 + ... + 2178968121.

Almost surely, 2^209180935056 is an apocalyptic number.

It is an amenable number.

209180935056 is an abundant number, since it is smaller than the sum of its proper divisors (331203147296).

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

209180935056 is a wasteful number, since it uses less digits than its factorization.

209180935056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4357936158 (or 4357936152 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 48.

The spelling of 209180935056 in words is "two hundred nine billion, one hundred eighty million, nine hundred thirty-five thousand, fifty-six".