217266420936 has 16 divisors (see below), whose sum is σ = 543166052400. Its totient is φ = 72422140304.

The previous prime is 217266420923. The next prime is 217266420937. The reversal of 217266420936 is 639024662712.

It is not an unprimeable number, because it can be changed into a prime (217266420937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4526383746 + ... + 4526383793.

It is an arithmetic number, because the mean of its divisors is an integer number (33947878275).

Almost surely, 2^217266420936 is an apocalyptic number.

It is an amenable number.

217266420936 is an abundant number, since it is smaller than the sum of its proper divisors (325899631464).

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

217266420936 is a wasteful number, since it uses less digits than its factorization.

217266420936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9052767548 (or 9052767544 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 48.

The spelling of 217266420936 in words is "two hundred seventeen billion, two hundred sixty-six million, four hundred twenty thousand, nine hundred thirty-six".