25557513916945 has 16 divisors (see below), whose sum is σ = 32616129731328. Its totient is φ = 19158532314880.

The previous prime is 25557513916853. The next prime is 25557513916967. The reversal of 25557513916945 is 54961931575552.

It is not a de Polignac number, because 25557513916945 - 2⁷ = 25557513916817 is a prime.

It is a super-2 number, since 2×25557513916945² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 662264041 + ... + 662302630.

It is an arithmetic number, because the mean of its divisors is an integer number (2038508108208).

Almost surely, 2^{25557513916945} is an apocalyptic number.

It is an amenable number.

25557513916945 is a deficient number, since it is larger than the sum of its proper divisors (7058615814383).

25557513916945 is a wasteful number, since it uses less digits than its factorization.

25557513916945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324566920.

The product of its digits is 255150000, while the sum is 67.

The spelling of 25557513916945 in words is "twenty-five trillion, five hundred fifty-seven billion, five hundred thirteen million, nine hundred sixteen thousand, nine hundred forty-five".