625555240265 has 4 divisors (see below), whose sum is σ = 750666288324. Its totient is φ = 500444192208.

The previous prime is 625555240253. The next prime is 625555240273. The reversal of 625555240265 is 562042555526.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 279279483961 + 346275756304 = 528469^2 + 588452^2 .

It is a cyclic number.

It is not a de Polignac number, because 625555240265 - 2²⁴ = 625538463049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62555524022 + ... + 62555524031.

It is an arithmetic number, because the mean of its divisors is an integer number (187666572081).

Almost surely, 2^625555240265 is an apocalyptic number.

It is an amenable number.

625555240265 is a deficient number, since it is larger than the sum of its proper divisors (125111048059).

625555240265 is a wasteful number, since it uses less digits than its factorization.

625555240265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125111048058.

The product of its (nonzero) digits is 3600000, while the sum is 47.

The spelling of 625555240265 in words is "six hundred twenty-five billion, five hundred fifty-five million, two hundred forty thousand, two hundred sixty-five".