25212505201440 has 48 divisors (see below), whose sum is σ = 79419391386048. Its totient is φ = 6723334720256.

The previous prime is 25212505201427. The next prime is 25212505201511. The reversal of 25212505201440 is 4410250521252.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26263025772 + ... + 26263026731.

It is an arithmetic number, because the mean of its divisors is an integer number (1654570653876).

Almost surely, 2^{25212505201440} is an apocalyptic number.

25212505201440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25212505201440 is an abundant number, since it is smaller than the sum of its proper divisors (54206886184608).

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

25212505201440 is a wasteful number, since it uses less digits than its factorization.

25212505201440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52526052521 (or 52526052513 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 33.

Adding to 25212505201440 its reverse (4410250521252), we get a palindrome (29622755722692).

The spelling of 25212505201440 in words is "twenty-five trillion, two hundred twelve billion, five hundred five million, two hundred one thousand, four hundred forty".