12355312240 has 20 divisors (see below), whose sum is σ = 28726101144. Its totient is φ = 4942124864.

The previous prime is 12355312231. The next prime is 12355312259. The reversal of 12355312240 is 4221355321.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 12355312199 and 12355312208.

It is a congruent number.

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, 77220622 + ... + 77220781.

Almost surely, 2^12355312240 is an apocalyptic number.

12355312240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12355312240 is an abundant number, since it is smaller than the sum of its proper divisors (16370788904).

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

12355312240 is a wasteful number, since it uses less digits than its factorization.

12355312240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154441416 (or 154441410 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 12355312240 its reverse (4221355321), we get a palindrome (16576667561).

The spelling of 12355312240 in words is "twelve billion, three hundred fifty-five million, three hundred twelve thousand, two hundred forty".