215134166456 has 64 divisors (see below), whose sum is σ = 468791297280. Its totient is φ = 91471265280.

The previous prime is 215134166449. The next prime is 215134166459. The reversal of 215134166456 is 654661431512.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215134166459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197276 + ... + 684971.

It is an arithmetic number, because the mean of its divisors is an integer number (7324864020).

Almost surely, 2^215134166456 is an apocalyptic number.

It is an amenable number.

215134166456 is an abundant number, since it is smaller than the sum of its proper divisors (253657130824).

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

215134166456 is a wasteful number, since it uses less digits than its factorization.

215134166456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882444 (or 882440 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

Adding to 215134166456 its reverse (654661431512), we get a palindrome (869795597968).

The spelling of 215134166456 in words is "two hundred fifteen billion, one hundred thirty-four million, one hundred sixty-six thousand, four hundred fifty-six".