217536946011 has 48 divisors (see below), whose sum is σ = 401309895168. Its totient is φ = 110249942400.

The previous prime is 217536945961. The next prime is 217536946043. The reversal of 217536946011 is 110649635712.

217536946011 is a `hidden beast` number, since 2 + 1 + 7 + 5 + 36 + 9 + 4 + 601 + 1 = 666.

It is not a de Polignac number, because 217536946011 - 2³⁰ = 216463204187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (217536946811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3799711 + ... + 3856536.

It is an arithmetic number, because the mean of its divisors is an integer number (8360622816).

Almost surely, 2^217536946011 is an apocalyptic number.

217536946011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

217536946011 is a deficient number, since it is larger than the sum of its proper divisors (183772949157).

217536946011 is a wasteful number, since it uses less digits than its factorization.

217536946011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7656312 (or 7656309 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 217536946011 in words is "two hundred seventeen billion, five hundred thirty-six million, nine hundred forty-six thousand, eleven".