620705221298 has 6 divisors (see below), whose sum is σ = 931059503229. Its totient is φ = 310352053556.

The previous prime is 620705221289. The next prime is 620705221333. The reversal of 620705221298 is 892122507026.

It can be written as a sum of positive squares in 2 ways, for example, as 494457893329 + 126247327969 = 703177^2 + 355313^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=557093.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 835640 + ... + 1392732.

Almost surely, 2^620705221298 is an apocalyptic number.

620705221298 is a deficient number, since it is larger than the sum of its proper divisors (310354281931).

620705221298 is an frugal number, since it uses more digits than its factorization.

620705221298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114188 (or 557095 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 620705221298 in words is "six hundred twenty billion, seven hundred five million, two hundred twenty-one thousand, two hundred ninety-eight".