12355457520 has 160 divisors (see below), whose sum is σ = 44599859712. Its totient is φ = 2770799616.

The previous prime is 12355457519. The next prime is 12355457533. The reversal of 12355457520 is 2575455321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19659 + ... + 158421.

Almost surely, 2^12355457520 is an apocalyptic number.

12355457520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12355457520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22299929856).

12355457520 is an abundant number, since it is smaller than the sum of its proper divisors (32244402192).

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

12355457520 is a wasteful number, since it uses less digits than its factorization.

12355457520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138839 (or 138833 counting only the distinct ones).

The product of its (nonzero) digits is 210000, while the sum is 39.

The spelling of 12355457520 in words is "twelve billion, three hundred fifty-five million, four hundred fifty-seven thousand, five hundred twenty".