612890055 has 12 divisors (see below), whose sum is σ = 1062342840. Its totient is φ = 326874672.

The previous prime is 612890029. The next prime is 612890063. The reversal of 612890055 is 550098216.

It is a happy number.

It is not a de Polignac number, because 612890055 - 2⁵ = 612890023 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 6809845 + ... + 6809934.

It is an arithmetic number, because the mean of its divisors is an integer number (88528570).

Almost surely, 2^612890055 is an apocalyptic number.

612890055 is a deficient number, since it is larger than the sum of its proper divisors (449452785).

612890055 is a wasteful number, since it uses less digits than its factorization.

612890055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13619790 (or 13619787 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 612890055 is about 24756.6163883516. The cubic root of 612890055 is about 849.4298621867.

The spelling of 612890055 in words is "six hundred twelve million, eight hundred ninety thousand, fifty-five".