12505662050667 has 16 divisors (see below), whose sum is σ = 17655141843072. Its totient is φ = 7846650120320.

The previous prime is 12505662050639. The next prime is 12505662050677. The reversal of 12505662050667 is 76605026650521.

It is a cyclic number.

It is not a de Polignac number, because 12505662050667 - 2¹⁵ = 12505662017899 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (12505662050627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12034192 + ... + 13032002.

It is an arithmetic number, because the mean of its divisors is an integer number (1103446365192).

Almost surely, 2^{12505662050667} is an apocalyptic number.

12505662050667 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12505662050667 is a deficient number, since it is larger than the sum of its proper divisors (5149479792405).

12505662050667 is a wasteful number, since it uses less digits than its factorization.

12505662050667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243578.

The product of its (nonzero) digits is 4536000, while the sum is 51.

The spelling of 12505662050667 in words is "twelve trillion, five hundred five billion, six hundred sixty-two million, fifty thousand, six hundred sixty-seven".