620623451604655 has 16 divisors (see below), whose sum is σ = 745333439392224. Its totient is φ = 496108567991680.

The previous prime is 620623451604643. The next prime is 620623451604659. The reversal of 620623451604655 is 556406154326026.

620623451604655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 620623451604655 - 2¹¹ = 620623451602607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 620623451604596 and 620623451604605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620623451604659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1780867125 + ... + 1781215585.

It is an arithmetic number, because the mean of its divisors is an integer number (46583339962014).

Almost surely, 2^{620623451604655} is an apocalyptic number.

620623451604655 is a deficient number, since it is larger than the sum of its proper divisors (124709987787569).

620623451604655 is a wasteful number, since it uses less digits than its factorization.

620623451604655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627386.

The product of its (nonzero) digits is 31104000, while the sum is 55.

The spelling of 620623451604655 in words is "six hundred twenty trillion, six hundred twenty-three billion, four hundred fifty-one million, six hundred four thousand, six hundred fifty-five".