25025305505557 has 16 divisors (see below), whose sum is σ = 29033999672832. Its totient is φ = 21125173520880.

The previous prime is 25025305505549. The next prime is 25025305505567. The reversal of 25025305505557 is 75550550352052.

It is a cyclic number.

It is not a de Polignac number, because 25025305505557 - 2³ = 25025305505549 is a prime.

It is a super-2 number, since 2×25025305505557² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25025305505557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25025305505567) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4220419 + ... + 8237872.

It is an arithmetic number, because the mean of its divisors is an integer number (1814624979552).

Almost surely, 2^{25025305505557} is an apocalyptic number.

It is an amenable number.

25025305505557 is a deficient number, since it is larger than the sum of its proper divisors (4008694167275).

25025305505557 is a wasteful number, since it uses less digits than its factorization.

25025305505557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12462648.

The product of its (nonzero) digits is 6562500, while the sum is 49.

The spelling of 25025305505557 in words is "twenty-five trillion, twenty-five billion, three hundred five million, five hundred five thousand, five hundred fifty-seven".