620555645618769 has 32 divisors (see below), whose sum is σ = 955064500992000. Its totient is φ = 351071476545024.

The previous prime is 620555645618749. The next prime is 620555645618773. The reversal of 620555645618769 is 967816546555026.

It is not a de Polignac number, because 620555645618769 - 2⁵ = 620555645618737 is a prime.

It is a super-2 number, since 2×620555645618769² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 620555645618769.

It is not an unprimeable number, because it can be changed into a prime (620555645618749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295041024 + ... + 297136865.

It is an arithmetic number, because the mean of its divisors is an integer number (29845765656000).

Almost surely, 2^{620555645618769} is an apocalyptic number.

It is an amenable number.

620555645618769 is a deficient number, since it is larger than the sum of its proper divisors (334508855373231).

620555645618769 is a wasteful number, since it uses less digits than its factorization.

620555645618769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592178397.

The product of its (nonzero) digits is 3265920000, while the sum is 75.

The spelling of 620555645618769 in words is "six hundred twenty trillion, five hundred fifty-five billion, six hundred forty-five million, six hundred eighteen thousand, seven hundred sixty-nine".