12315783550 has 96 divisors (see below), whose sum is σ = 27463099392. Its totient is φ = 4017530880.

The previous prime is 12315783547. The next prime is 12315783559. The reversal of 12315783550 is 5538751321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12315783559) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1549687 + ... + 1557613.

It is an arithmetic number, because the mean of its divisors is an integer number (286073952).

Almost surely, 2^12315783550 is an apocalyptic number.

12315783550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12315783550 is an abundant number, since it is smaller than the sum of its proper divisors (15147315842).

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

12315783550 is a wasteful number, since it uses less digits than its factorization.

12315783550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8162 (or 8157 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 12315783550 in words is "twelve billion, three hundred fifteen million, seven hundred eighty-three thousand, five hundred fifty".