209174215152 has 80 divisors (see below), whose sum is σ = 630701632512. Its totient is φ = 58492481280.

The previous prime is 209174215147. The next prime is 209174215163. The reversal of 209174215152 is 251512471902.

It is a self number, because there is not a number n which added to its sum of digits gives 209174215152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6606999 + ... + 6638582.

Almost surely, 2^209174215152 is an apocalyptic number.

It is an amenable number.

209174215152 is an abundant number, since it is smaller than the sum of its proper divisors (421527417360).

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

209174215152 is a wasteful number, since it uses less digits than its factorization.

209174215152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13245646 (or 13245640 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The spelling of 209174215152 in words is "two hundred nine billion, one hundred seventy-four million, two hundred fifteen thousand, one hundred fifty-two".