12694131550 has 24 divisors (see below), whose sum is σ = 23963495256. Its totient is φ = 5001865440.

The previous prime is 12694131547. The next prime is 12694131551. The reversal of 12694131550 is 5513149621.

12694131550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12694131550² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12694131551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1891297 + ... + 1897996.

It is an arithmetic number, because the mean of its divisors is an integer number (998478969).

Almost surely, 2^12694131550 is an apocalyptic number.

12694131550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12694131550 is a deficient number, since it is larger than the sum of its proper divisors (11269363706).

12694131550 is a wasteful number, since it uses less digits than its factorization.

12694131550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3789372 (or 3789367 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 12694131550 in words is "twelve billion, six hundred ninety-four million, one hundred thirty-one thousand, five hundred fifty".