123444647699 has 4 divisors (see below), whose sum is σ = 129941734440. Its totient is φ = 116947560960.

The previous prime is 123444647693. The next prime is 123444647759. The reversal of 123444647699 is 996746444321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123444647699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123444647693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3248543342 + ... + 3248543379.

It is an arithmetic number, because the mean of its divisors is an integer number (32485433610).

Almost surely, 2^123444647699 is an apocalyptic number.

123444647699 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

123444647699 is a deficient number, since it is larger than the sum of its proper divisors (6497086741).

123444647699 is an equidigital number, since it uses as much as digits as its factorization.

123444647699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6497086740.

The product of its digits is 31352832, while the sum is 59.

The spelling of 123444647699 in words is "one hundred twenty-three billion, four hundred forty-four million, six hundred forty-seven thousand, six hundred ninety-nine".