620345555 has 16 divisors (see below), whose sum is σ = 796340160. Its totient is φ = 462262272.

The previous prime is 620345543. The next prime is 620345567. The reversal of 620345555 is 555543026.

It is an interprime number because it is at equal distance from previous prime (620345543) and next prime (620345567).

It is a cyclic number.

It is not a de Polignac number, because 620345555 - 2¹² = 620341459 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 29375 + ... + 45864.

It is an arithmetic number, because the mean of its divisors is an integer number (49771260).

Almost surely, 2^620345555 is an apocalyptic number.

620345555 is a deficient number, since it is larger than the sum of its proper divisors (175994605).

620345555 is a wasteful number, since it uses less digits than its factorization.

620345555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75358.

The product of its (nonzero) digits is 90000, while the sum is 35.

The square root of 620345555 is about 24906.7371407818. The cubic root of 620345555 is about 852.8602857904.

The spelling of 620345555 in words is "six hundred twenty million, three hundred forty-five thousand, five hundred fifty-five".