12642344451 has 24 divisors (see below), whose sum is σ = 19928965680. Its totient is φ = 7659067200.

The previous prime is 12642344441. The next prime is 12642344461. The reversal of 12642344451 is 15444324621.

12642344451 is a `hidden beast` number, since 1 + 2 + 642 + 3 + 4 + 4 + 4 + 5 + 1 = 666.

12642344451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12642344441) and next prime (12642344461).

It is not a de Polignac number, because 12642344451 - 2²¹ = 12640247299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12642344441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248065 + ... + 294653.

It is an arithmetic number, because the mean of its divisors is an integer number (830373570).

Almost surely, 2^12642344451 is an apocalyptic number.

12642344451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12642344451 is a deficient number, since it is larger than the sum of its proper divisors (7286621229).

12642344451 is a wasteful number, since it uses less digits than its factorization.

12642344451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49347 (or 49344 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The spelling of 12642344451 in words is "twelve billion, six hundred forty-two million, three hundred forty-four thousand, four hundred fifty-one".