12626661625 has 64 divisors (see below), whose sum is σ = 17106785280. Its totient is φ = 9282873600.

The previous prime is 12626661589. The next prime is 12626661629. The reversal of 12626661625 is 52616662621.

It is a happy number.

It is not a de Polignac number, because 12626661625 - 2²¹ = 12624564473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12626661629) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6302874 + ... + 6304876.

It is an arithmetic number, because the mean of its divisors is an integer number (267293520).

Almost surely, 2^12626661625 is an apocalyptic number.

It is an amenable number.

12626661625 is a deficient number, since it is larger than the sum of its proper divisors (4480123655).

12626661625 is a wasteful number, since it uses less digits than its factorization.

12626661625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131 (or 2121 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The spelling of 12626661625 in words is "twelve billion, six hundred twenty-six million, six hundred sixty-one thousand, six hundred twenty-five".