12596976405 has 24 divisors (see below), whose sum is σ = 23514357048. Its totient is φ = 6201588096.

The previous prime is 12596976401. The next prime is 12596976437. The reversal of 12596976405 is 50467969521.

12596976405 is a `hidden beast` number, since 1 + 2 + 596 + 9 + 7 + 6 + 40 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 257987844 + 12338988561 = 16062^2 + 111081^2 .

It is not a de Polignac number, because 12596976405 - 2² = 12596976401 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12596976401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10766062 + ... + 10767231.

It is an arithmetic number, because the mean of its divisors is an integer number (979764877).

Almost surely, 2^12596976405 is an apocalyptic number.

12596976405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12596976405 is a deficient number, since it is larger than the sum of its proper divisors (10917380643).

12596976405 is a wasteful number, since it uses less digits than its factorization.

12596976405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21533317 (or 21533314 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 12596976405 in words is "twelve billion, five hundred ninety-six million, nine hundred seventy-six thousand, four hundred five".