12562640421 has 16 divisors (see below), whose sum is σ = 16808590848. Its totient is φ = 8345937600.

The previous prime is 12562640401. The next prime is 12562640491. The reversal of 12562640421 is 12404626521.

It is not a de Polignac number, because 12562640421 - 2¹¹ = 12562638373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12562640401) 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, 1246615 + ... + 1256651.

It is an arithmetic number, because the mean of its divisors is an integer number (1050536928).

Almost surely, 2^12562640421 is an apocalyptic number.

It is an amenable number.

12562640421 is a deficient number, since it is larger than the sum of its proper divisors (4245950427).

12562640421 is a wasteful number, since it uses less digits than its factorization.

12562640421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11452.

The product of its (nonzero) digits is 23040, while the sum is 33.

The spelling of 12562640421 in words is "twelve billion, five hundred sixty-two million, six hundred forty thousand, four hundred twenty-one".