620647650493 has 8 divisors (see below), whose sum is σ = 684691967736. Its totient is φ = 558932217600.

The previous prime is 620647650487. The next prime is 620647650527. The reversal of 620647650493 is 394056746026.

It can be written as a sum of positive squares in 4 ways, for example, as 85294954809 + 535352695684 = 292053^2 + 731678^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620647650493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 620647650493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620647650433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582220528 + ... + 582221593.

It is an arithmetic number, because the mean of its divisors is an integer number (85586495967).

Almost surely, 2^620647650493 is an apocalyptic number.

It is an amenable number.

620647650493 is a deficient number, since it is larger than the sum of its proper divisors (64044317243).

620647650493 is a wasteful number, since it uses less digits than its factorization.

620647650493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164442175.

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 620647650493 in words is "six hundred twenty billion, six hundred forty-seven million, six hundred fifty thousand, four hundred ninety-three".