216156651612 has 24 divisors (see below), whose sum is σ = 550216931712. Its totient is φ = 65502015600.

The previous prime is 216156651497. The next prime is 216156651673.

216156651612 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×216156651612² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 818775064 + ... + 818775327.

It is an arithmetic number, because the mean of its divisors is an integer number (22925705488).

Almost surely, 2^216156651612 is an apocalyptic number.

216156651612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

216156651612 is an abundant number, since it is smaller than the sum of its proper divisors (334060280100).

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

216156651612 is a wasteful number, since it uses less digits than its factorization.

216156651612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637550409 (or 1637550407 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

It can be divided in two parts, 216156 and 651612, that added together give a palindrome (867768).

The spelling of 216156651612 in words is "two hundred sixteen billion, one hundred fifty-six million, six hundred fifty-one thousand, six hundred twelve".