217091006734 has 16 divisors (see below), whose sum is σ = 376639820928. Its totient is φ = 91918050552.

The previous prime is 217091006681. The next prime is 217091006767. The reversal of 217091006734 is 437600190712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93411492 + ... + 93413815.

It is an arithmetic number, because the mean of its divisors is an integer number (23539988808).

Almost surely, 2^217091006734 is an apocalyptic number.

217091006734 is a deficient number, since it is larger than the sum of its proper divisors (159548814194).

217091006734 is a wasteful number, since it uses less digits than its factorization.

217091006734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186825399.

The product of its (nonzero) digits is 63504, while the sum is 40.

The spelling of 217091006734 in words is "two hundred seventeen billion, ninety-one million, six thousand, seven hundred thirty-four".