6420356125 has 8 divisors (see below), whose sum is σ = 8012604600. Its totient is φ = 5136284800.

The previous prime is 6420356083. The next prime is 6420356147. The reversal of 6420356125 is 5216530246.

It can be written as a sum of positive squares in 4 ways, for example, as 1692005956 + 4728350169 = 41134^2 + 68763^2 .

It is not a de Polignac number, because 6420356125 - 2¹¹ = 6420354077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25681300 + ... + 25681549.

It is an arithmetic number, because the mean of its divisors is an integer number (1001575575).

Almost surely, 2^6420356125 is an apocalyptic number.

It is an amenable number.

6420356125 is a deficient number, since it is larger than the sum of its proper divisors (1592248475).

6420356125 is an equidigital number, since it uses as much as digits as its factorization.

6420356125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51362864 (or 51362854 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 6420356125 is about 80127.1247768195. The cubic root of 6420356125 is about 1858.6018827156.

The spelling of 6420356125 in words is "six billion, four hundred twenty million, three hundred fifty-six thousand, one hundred twenty-five".