215645546512 has 120 divisors (see below), whose sum is σ = 487293311232. Its totient is φ = 91585804800.

The previous prime is 215645546507. The next prime is 215645546527.

215645546512 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×215645546512² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4564998 + ... + 4611994.

Almost surely, 2^215645546512 is an apocalyptic number.

215645546512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215645546512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243646655616).

215645546512 is an abundant number, since it is smaller than the sum of its proper divisors (271647764720).

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

215645546512 is a wasteful number, since it uses less digits than its factorization.

215645546512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47105 (or 47070 counting only the distinct ones).

The product of its digits is 1440000, while the sum is 46.

The spelling of 215645546512 in words is "two hundred fifteen billion, six hundred forty-five million, five hundred forty-six thousand, five hundred twelve".