620543655 has 12 divisors (see below), whose sum is σ = 1075609080. Its totient is φ = 330956592.

The previous prime is 620543641. The next prime is 620543669. The reversal of 620543655 is 556345026.

It is a happy number.

620543655 is a `hidden beast` number, since 62 + 0 + 543 + 6 + 55 = 666.

It is an interprime number because it is at equal distance from previous prime (620543641) and next prime (620543669).

It is not a de Polignac number, because 620543655 - 2¹⁰ = 620542631 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 (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6894885 + ... + 6894974.

It is an arithmetic number, because the mean of its divisors is an integer number (89634090).

Almost surely, 2^620543655 is an apocalyptic number.

620543655 is a deficient number, since it is larger than the sum of its proper divisors (455065425).

620543655 is a wasteful number, since it uses less digits than its factorization.

620543655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13789870 (or 13789867 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 620543655 is about 24910.7136589862. The cubic root of 620543655 is about 852.9510597363.

The spelling of 620543655 in words is "six hundred twenty million, five hundred forty-three thousand, six hundred fifty-five".