12057731550 has 96 divisors (see below), whose sum is σ = 34974547200. Its totient is φ = 3046157280.

The previous prime is 12057731537. The next prime is 12057731597. The reversal of 12057731550 is 5513775021.

It is a happy number.

12057731550 is a `hidden beast` number, since 1 + 2 + 0 + 5 + 77 + 31 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 209394 + ... + 260693.

It is an arithmetic number, because the mean of its divisors is an integer number (364318200).

Almost surely, 2^12057731550 is an apocalyptic number.

12057731550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12057731550 is an abundant number, since it is smaller than the sum of its proper divisors (22916815650).

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

12057731550 is a wasteful number, since it uses less digits than its factorization.

12057731550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470127 (or 470116 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 36.

The spelling of 12057731550 in words is "twelve billion, fifty-seven million, seven hundred thirty-one thousand, five hundred fifty".