6460140625 has 21 divisors (see below), whose sum is σ = 8087650383. Its totient is φ = 5160075000.

The previous prime is 6460140613. The next prime is 6460140637. The reversal of 6460140625 is 5260410646.

The square root of 6460140625 is 80375.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (6460140613) and next prime (6460140637).

It can be written as a sum of positive squares in 3 ways, for example, as 5659703361 + 800437264 = 75231^2 + 28292^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6460140625 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 10046554 + ... + 10047196.

Almost surely, 2^6460140625 is an apocalyptic number.

6460140625 is the 80375-th square number.

6460140625 is the 40188-th centered octagonal number.

It is an amenable number.

6460140625 is a deficient number, since it is larger than the sum of its proper divisors (1627509758).

6460140625 is an frugal number, since it uses more digits than its factorization.

6460140625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The cubic root of 6460140625 is about 1862.4329961031.

The spelling of 6460140625 in words is "six billion, four hundred sixty million, one hundred forty thousand, six hundred twenty-five".