12781541232 has 80 divisors (see below), whose sum is σ = 38282906880. Its totient is φ = 4075270848.

The previous prime is 12781541207. The next prime is 12781541251. The reversal of 12781541232 is 23214518721.

12781541232 is a `hidden beast` number, since 1 + 2 + 7 + 81 + 541 + 2 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 633258 + ... + 653129.

It is an arithmetic number, because the mean of its divisors is an integer number (478536336).

Almost surely, 2^12781541232 is an apocalyptic number.

12781541232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12781541232 is an abundant number, since it is smaller than the sum of its proper divisors (25501365648).

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

12781541232 is a wasteful number, since it uses less digits than its factorization.

12781541232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286427 (or 1286415 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The spelling of 12781541232 in words is "twelve billion, seven hundred eighty-one million, five hundred forty-one thousand, two hundred thirty-two".