217374385804 has 24 divisors (see below), whose sum is σ = 401895426240. Its totient is φ = 102706603776.

The previous prime is 217374385783. The next prime is 217374385817. The reversal of 217374385804 is 408583473712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19929837 + ... + 19940740.

It is an arithmetic number, because the mean of its divisors is an integer number (16745642760).

Almost surely, 2^217374385804 is an apocalyptic number.

It is an amenable number.

217374385804 is a deficient number, since it is larger than the sum of its proper divisors (184521040436).

217374385804 is a wasteful number, since it uses less digits than its factorization.

217374385804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39870657 (or 39870655 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 52.

The spelling of 217374385804 in words is "two hundred seventeen billion, three hundred seventy-four million, three hundred eighty-five thousand, eight hundred four".