6265494591409 has 27 divisors (see below), whose sum is σ = 6751503697347. Its totient is φ = 5813272571904.

The previous prime is 6265494591371. The next prime is 6265494591437. The reversal of 6265494591409 is 9041954945626.

The square root of 6265494591409 is 2503097.

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

It can be written as a sum of positive squares in 13 ways, for example, as 10133442225 + 6255361149184 = 100665^2 + 2501072^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6265494591409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6265494591469) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3106342369 + ... + 3106344385.

Almost surely, 2^{6265494591409} is an apocalyptic number.

6265494591409 is the 2503097-th square number.

6265494591409 is the 1251549-th centered octagonal number.

It is an amenable number.

6265494591409 is a deficient number, since it is larger than the sum of its proper divisors (486009105938).

6265494591409 is an frugal number, since it uses more digits than its factorization.

6265494591409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4214 (or 2107 counting only the distinct ones).

The product of its (nonzero) digits is 83980800, while the sum is 64.

Multiplying 6265494591409 by its sum of digits (64), we get a square (400991653850176 = 20024776²).

The spelling of 6265494591409 in words is "six trillion, two hundred sixty-five billion, four hundred ninety-four million, five hundred ninety-one thousand, four hundred nine".