217157425564 has 12 divisors (see below), whose sum is σ = 392284381888. Its totient is φ = 105076173600.

The previous prime is 217157425561. The next prime is 217157425637. The reversal of 217157425564 is 465524751712.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217157425561) 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, 875634657 + ... + 875634904.

Almost surely, 2^217157425564 is an apocalyptic number.

It is an amenable number.

217157425564 is a deficient number, since it is larger than the sum of its proper divisors (175126956324).

217157425564 is a wasteful number, since it uses less digits than its factorization.

217157425564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751269596 (or 1751269594 counting only the distinct ones).

The product of its digits is 2352000, while the sum is 49.

The spelling of 217157425564 in words is "two hundred seventeen billion, one hundred fifty-seven million, four hundred twenty-five thousand, five hundred sixty-four".