612181216 has 24 divisors (see below), whose sum is σ = 1268666280. Its totient is φ = 289980288.

The previous prime is 612181201. The next prime is 612181231.

612181216 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (612181201) and next prime (612181231).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502831 + ... + 504046.

It is an arithmetic number, because the mean of its divisors is an integer number (52861095).

Almost surely, 2^612181216 is an apocalyptic number.

It is an amenable number.

612181216 is an abundant number, since it is smaller than the sum of its proper divisors (656485064).

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

612181216 is a wasteful number, since it uses less digits than its factorization.

612181216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006906 (or 1006898 counting only the distinct ones).

The product of its digits is 1152, while the sum is 28.

The square root of 612181216 is about 24742.2960939360. The cubic root of 612181216 is about 849.1022660261.

The spelling of 612181216 in words is "six hundred twelve million, one hundred eighty-one thousand, two hundred sixteen".