2505055530557 has 4 divisors (see below), whose sum is σ = 2505604768956. Its totient is φ = 2504506292160.

The previous prime is 2505055530553. The next prime is 2505055530563. The reversal of 2505055530557 is 7550355505052.

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 1750556563396 + 754498967161 = 1323086^2 + 868619^2 .

It is a cyclic number.

It is not a de Polignac number, because 2505055530557 - 2² = 2505055530553 is a prime.

It is a super-2 number, since 2×2505055530557² (a number of 26 digits) 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 (2505055530553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274612358 + ... + 274621479.

It is an arithmetic number, because the mean of its divisors is an integer number (626401192239).

Almost surely, 2^{2505055530557} is an apocalyptic number.

It is an amenable number.

2505055530557 is a deficient number, since it is larger than the sum of its proper divisors (549238399).

2505055530557 is an equidigital number, since it uses as much as digits as its factorization.

2505055530557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549238398.

The product of its (nonzero) digits is 3281250, while the sum is 47.

The spelling of 2505055530557 in words is "two trillion, five hundred five billion, fifty-five million, five hundred thirty thousand, five hundred fifty-seven".