216972279612 has 96 divisors (see below), whose sum is σ = 613851436800. Its totient is φ = 65728555200.

The previous prime is 216972279553. The next prime is 216972279619.

216972279612 is a `hidden beast` number, since 2 + 16 + 9 + 7 + 2 + 2 + 7 + 9 + 612 = 666.

216972279612 is nontrivially palindromic in base 10.

216972279612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216972279619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3999187 + ... + 4053077.

It is an arithmetic number, because the mean of its divisors is an integer number (6394285800).

Almost surely, 2^216972279612 is an apocalyptic number.

216972279612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

216972279612 is an abundant number, since it is smaller than the sum of its proper divisors (396879157188).

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

216972279612 is a wasteful number, since it uses less digits than its factorization.

216972279612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57304 (or 57296 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The spelling of 216972279612 in words is "two hundred sixteen billion, nine hundred seventy-two million, two hundred seventy-nine thousand, six hundred twelve".