12621464426 has 4 divisors (see below), whose sum is σ = 18932196642. Its totient is φ = 6310732212.

The previous prime is 12621464413. The next prime is 12621464501. The reversal of 12621464426 is 62446412621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62446412621 = 80599 ⋅774779.

It can be written as a sum of positive squares in only one way, i.e., 12144260401 + 477204025 = 110201^2 + 21845^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12621464426.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3155366105 + ... + 3155366108.

Almost surely, 2^12621464426 is an apocalyptic number.

12621464426 is a deficient number, since it is larger than the sum of its proper divisors (6310732216).

12621464426 is an equidigital number, since it uses as much as digits as its factorization.

12621464426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6310732215.

The product of its digits is 110592, while the sum is 38.

The spelling of 12621464426 in words is "twelve billion, six hundred twenty-one million, four hundred sixty-four thousand, four hundred twenty-six".