620520655 has 8 divisors (see below), whose sum is σ = 788426352. Its totient is φ = 467215488.

The previous prime is 620520653. The next prime is 620520683. The reversal of 620520655 is 556025026.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 620520655 - 2¹ = 620520653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620520653) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3650037 + ... + 3650206.

It is an arithmetic number, because the mean of its divisors is an integer number (98553294).

Almost surely, 2^620520655 is an apocalyptic number.

620520655 is a deficient number, since it is larger than the sum of its proper divisors (167905697).

620520655 is a wasteful number, since it uses less digits than its factorization.

620520655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7300265.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 620520655 is about 24910.2520059513. The cubic root of 620520655 is about 852.9405216022.

The spelling of 620520655 in words is "six hundred twenty million, five hundred twenty thousand, six hundred fifty-five".