6244640655325 has 6 divisors (see below), whose sum is σ = 7743354412634. Its totient is φ = 4995712524240.

The previous prime is 6244640655313. The next prime is 6244640655329. The reversal of 6244640655325 is 5235560464426.

It can be written as a sum of positive squares in 3 ways, for example, as 1377238379364 + 4867402275961 = 1173558^2 + 2206219^2 .

It is not a de Polignac number, because 6244640655325 - 2³³ = 6236050720733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6244640655329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124892813082 + ... + 124892813131.

Almost surely, 2^{6244640655325} is an apocalyptic number.

It is an amenable number.

6244640655325 is a deficient number, since it is larger than the sum of its proper divisors (1498713757309).

6244640655325 is a wasteful number, since it uses less digits than its factorization.

6244640655325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249785626223 (or 249785626218 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 52.

The spelling of 6244640655325 in words is "six trillion, two hundred forty-four billion, six hundred forty million, six hundred fifty-five thousand, three hundred twenty-five".