12658705905 has 16 divisors (see below), whose sum is σ = 20332744704. Its totient is φ = 6725038080.

The previous prime is 12658705879. The next prime is 12658705957. The reversal of 12658705905 is 50950785621.

It is a happy number.

It is not a de Polignac number, because 12658705905 - 2¹⁶ = 12658640369 is a prime.

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, 1638001 + ... + 1645710.

It is an arithmetic number, because the mean of its divisors is an integer number (1270796544).

Almost surely, 2^12658705905 is an apocalyptic number.

12658705905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12658705905 is a deficient number, since it is larger than the sum of its proper divisors (7674038799).

12658705905 is a wasteful number, since it uses less digits than its factorization.

12658705905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283976.

The product of its (nonzero) digits is 756000, while the sum is 48.

The spelling of 12658705905 in words is "twelve billion, six hundred fifty-eight million, seven hundred five thousand, nine hundred five".