12562661405 has 32 divisors (see below), whose sum is σ = 17599680000. Its totient is φ = 8604951936.

The previous prime is 12562661303. The next prime is 12562661429. The reversal of 12562661405 is 50416626521.

It is not a de Polignac number, because 12562661405 - 2¹² = 12562657309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1795544 + ... + 1802526.

It is an arithmetic number, because the mean of its divisors is an integer number (549990000).

Almost surely, 2^12562661405 is an apocalyptic number.

It is an amenable number.

12562661405 is a deficient number, since it is larger than the sum of its proper divisors (5037018595).

12562661405 is an equidigital number, since it uses as much as digits as its factorization.

12562661405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8058 (or 8044 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 12562661405 in words is "twelve billion, five hundred sixty-two million, six hundred sixty-one thousand, four hundred five".