620231043505 has 12 divisors (see below), whose sum is σ = 744766131636. Its totient is φ = 495859128800.

The previous prime is 620231043473. The next prime is 620231043511. The reversal of 620231043505 is 505340132026.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 168125420961 + 452105622544 = 410031^2 + 672388^2 .

It is not a de Polignac number, because 620231043505 - 2⁵ = 620231043473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 12315075 + ... + 12365335.

It is an arithmetic number, because the mean of its divisors is an integer number (62063844303).

Almost surely, 2^620231043505 is an apocalyptic number.

It is an amenable number.

620231043505 is a deficient number, since it is larger than the sum of its proper divisors (124535088131).

620231043505 is an frugal number, since it uses more digits than its factorization.

620231043505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53408 (or 51837 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 620231043505 in words is "six hundred twenty billion, two hundred thirty-one million, forty-three thousand, five hundred five".