25421206144 has 32 divisors (see below), whose sum is σ = 50670934740. Its totient is φ = 12703795200.

The previous prime is 25421206127. The next prime is 25421206157. The reversal of 25421206144 is 44160212452.

It can be written as a sum of positive squares in 2 ways, for example, as 25118446144 + 302760000 = 158488^2 + 17400^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191092 + ... + 295564.

Almost surely, 2^25421206144 is an apocalyptic number.

It is an amenable number.

25421206144 is a deficient number, since it is larger than the sum of its proper divisors (25249728596).

25421206144 is a wasteful number, since it uses less digits than its factorization.

25421206144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106388 (or 106376 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 25421206144 its reverse (44160212452), we get a palindrome (69581418596).

The spelling of 25421206144 in words is "twenty-five billion, four hundred twenty-one million, two hundred six thousand, one hundred forty-four".