12621345506 has 16 divisors (see below), whose sum is σ = 23603555520. Its totient is φ = 4917407280.

The previous prime is 12621345491. The next prime is 12621345521. The reversal of 12621345506 is 60554312621.

It is an interprime number because it is at equal distance from previous prime (12621345491) and next prime (12621345521).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40978241 + ... + 40978548.

It is an arithmetic number, because the mean of its divisors is an integer number (1475222220).

Almost surely, 2^12621345506 is an apocalyptic number.

12621345506 is a deficient number, since it is larger than the sum of its proper divisors (10982210014).

12621345506 is a wasteful number, since it uses less digits than its factorization.

12621345506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81956809.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 12621345506 in words is "twelve billion, six hundred twenty-one million, three hundred forty-five thousand, five hundred six".