612780216 has 16 divisors (see below), whose sum is σ = 1531950600. Its totient is φ = 204260064.

The previous prime is 612780209. The next prime is 612780221. The reversal of 612780216 is 612087216.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12766231 + ... + 12766278.

Almost surely, 2^612780216 is an apocalyptic number.

It is an amenable number.

612780216 is an abundant number, since it is smaller than the sum of its proper divisors (919170384).

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

612780216 is a wasteful number, since it uses less digits than its factorization.

612780216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25532518 (or 25532514 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 612780216 is about 24754.3979122903. The cubic root of 612780216 is about 849.3791156729.

The spelling of 612780216 in words is "six hundred twelve million, seven hundred eighty thousand, two hundred sixteen".