25445203404240 has 80 divisors (see below), whose sum is σ = 81424650917376. Its totient is φ = 6566504102400.

The previous prime is 25445203404239. The next prime is 25445203404359. The reversal of 25445203404240 is 4240430254452.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent 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, 1710019671 + ... + 1710034550.

Almost surely, 2^{25445203404240} is an apocalyptic number.

25445203404240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25445203404240 is an abundant number, since it is smaller than the sum of its proper divisors (55979447513136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25445203404240 is a wasteful number, since it uses less digits than its factorization.

25445203404240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420054268 (or 3420054262 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 39.

Adding to 25445203404240 its reverse (4240430254452), we get a palindrome (29685633658692).

The spelling of 25445203404240 in words is "twenty-five trillion, four hundred forty-five billion, two hundred three million, four hundred four thousand, two hundred forty".