215553110164 has 24 divisors (see below), whose sum is σ = 435550619840. Its totient is φ = 91427533056.

The previous prime is 215553110137. The next prime is 215553110167. The reversal of 215553110164 is 461011355512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215553110167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39679374 + ... + 39684805.

Almost surely, 2^215553110164 is an apocalyptic number.

It is an amenable number.

215553110164 is an abundant number, since it is smaller than the sum of its proper divisors (219997509676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215553110164 is a wasteful number, since it uses less digits than its factorization.

215553110164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79364287 (or 79364285 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

Adding to 215553110164 its reverse (461011355512), we get a palindrome (676564465676).

The spelling of 215553110164 in words is "two hundred fifteen billion, five hundred fifty-three million, one hundred ten thousand, one hundred sixty-four".