123449243534 has 4 divisors (see below), whose sum is σ = 185173865304. Its totient is φ = 61724621766.

The previous prime is 123449243527. The next prime is 123449243539. The reversal of 123449243534 is 435342944321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123449243539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30862310882 + ... + 30862310885.

It is an arithmetic number, because the mean of its divisors is an integer number (46293466326).

Almost surely, 2^123449243534 is an apocalyptic number.

123449243534 is a deficient number, since it is larger than the sum of its proper divisors (61724621770).

123449243534 is an equidigital number, since it uses as much as digits as its factorization.

123449243534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61724621769.

The product of its digits is 1244160, while the sum is 44.

The spelling of 123449243534 in words is "one hundred twenty-three billion, four hundred forty-nine million, two hundred forty-three thousand, five hundred thirty-four".