620644680103 has 4 divisors (see below), whose sum is σ = 709308205840. Its totient is φ = 531981154368.

The previous prime is 620644680041. The next prime is 620644680109. The reversal of 620644680103 is 301086446026.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620644680103 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 (620644680109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44331762858 + ... + 44331762871.

It is an arithmetic number, because the mean of its divisors is an integer number (177327051460).

Almost surely, 2^620644680103 is an apocalyptic number.

620644680103 is a deficient number, since it is larger than the sum of its proper divisors (88663525737).

620644680103 is an equidigital number, since it uses as much as digits as its factorization.

620644680103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88663525736.

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 620644680103 in words is "six hundred twenty billion, six hundred forty-four million, six hundred eighty thousand, one hundred three".