217336140465 has 64 divisors (see below), whose sum is σ = 369159014400. Its totient is φ = 108879427584.

The previous prime is 217336140457. The next prime is 217336140479. The reversal of 217336140465 is 564041633712.

217336140465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 217336140465 - 2³ = 217336140457 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20388417 + ... + 20399073.

It is an arithmetic number, because the mean of its divisors is an integer number (5768109600).

Almost surely, 2^217336140465 is an apocalyptic number.

It is an amenable number.

217336140465 is a deficient number, since it is larger than the sum of its proper divisors (151822873935).

217336140465 is a wasteful number, since it uses less digits than its factorization.

217336140465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11286.

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 217336140465 in words is "two hundred seventeen billion, three hundred thirty-six million, one hundred forty thousand, four hundred sixty-five".