25505942144 has 32 divisors (see below), whose sum is σ = 50928477600. Its totient is φ = 12723892992.

The previous prime is 25505942117. The next prime is 25505942149. The reversal of 25505942144 is 44124950552.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (25505942149) 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, 170762 + ... + 283145.

It is an arithmetic number, because the mean of its divisors is an integer number (1591514925).

Almost surely, 2^25505942144 is an apocalyptic number.

It is an amenable number.

25505942144 is a deficient number, since it is larger than the sum of its proper divisors (25422535456).

25505942144 is an equidigital number, since it uses as much as digits as its factorization.

25505942144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454360 (or 454348 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 25505942144 in words is "twenty-five billion, five hundred five million, nine hundred forty-two thousand, one hundred forty-four".