620440341623 has 4 divisors (see below), whose sum is σ = 620443383120. Its totient is φ = 620437300128.

The previous prime is 620440341607. The next prime is 620440341767. The reversal of 620440341623 is 326143044026.

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

It is a cyclic number.

It is not a de Polignac number, because 620440341623 - 2⁴ = 620440341607 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 (620440371623) 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 3 ways as a sum of consecutive naturals, for example, 1190915 + ... + 1630692.

It is an arithmetic number, because the mean of its divisors is an integer number (155110845780).

Almost surely, 2^620440341623 is an apocalyptic number.

620440341623 is a deficient number, since it is larger than the sum of its proper divisors (3041497).

620440341623 is a wasteful number, since it uses less digits than its factorization.

620440341623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041496.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 620440341623 its reverse (326143044026), we get a palindrome (946583385649).

The spelling of 620440341623 in words is "six hundred twenty billion, four hundred forty million, three hundred forty-one thousand, six hundred twenty-three".