6514643125 has 20 divisors (see below), whose sum is σ = 8146201756. Its totient is φ = 5208192000.

The previous prime is 6514643111. The next prime is 6514643129. The reversal of 6514643125 is 5213464156.

It can be written as a sum of positive squares in 10 ways, for example, as 6509585124 + 5058001 = 80682^2 + 2249^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6514643125 is a prime.

It is a super-2 number, since 2×6514643125² = 84881150092219531250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6514643129) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1318159 + ... + 1323091.

Almost surely, 2^6514643125 is an apocalyptic number.

It is an amenable number.

6514643125 is a deficient number, since it is larger than the sum of its proper divisors (1631558631).

6514643125 is an equidigital number, since it uses as much as digits as its factorization.

6514643125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7066 (or 7051 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 6514643125 is about 80713.3392011506. The cubic root of 6514643125 is about 1867.6559536958.

The spelling of 6514643125 in words is "six billion, five hundred fourteen million, six hundred forty-three thousand, one hundred twenty-five".