215545164656 has 20 divisors (see below), whose sum is σ = 417625973352. Its totient is φ = 107770719936.

The previous prime is 215545164613. The next prime is 215545164671. The reversal of 215545164656 is 656461545512.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1659050 + ... + 1784246.

Almost surely, 2^215545164656 is an apocalyptic number.

It is an amenable number.

215545164656 is a deficient number, since it is larger than the sum of its proper divisors (202080808696).

215545164656 is a wasteful number, since it uses less digits than its factorization.

215545164656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232808 (or 232802 counting only the distinct ones).

The product of its digits is 4320000, while the sum is 50.

The spelling of 215545164656 in words is "two hundred fifteen billion, five hundred forty-five million, one hundred sixty-four thousand, six hundred fifty-six".