123512481667 has 4 divisors (see below), whose sum is σ = 123513409296. Its totient is φ = 123511554040.

The previous prime is 123512481647. The next prime is 123512481679. The reversal of 123512481667 is 766184215321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123512481667 is a prime.

It is a super-2 number, since 2×123512481667² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123512481637) 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, 222103 + ... + 544384.

It is an arithmetic number, because the mean of its divisors is an integer number (30878352324).

Almost surely, 2^123512481667 is an apocalyptic number.

123512481667 is a deficient number, since it is larger than the sum of its proper divisors (927629).

123512481667 is an equidigital number, since it uses as much as digits as its factorization.

123512481667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927628.

The product of its digits is 483840, while the sum is 46.

Adding to 123512481667 its reverse (766184215321), we get a palindrome (889696696988).

The spelling of 123512481667 in words is "one hundred twenty-three billion, five hundred twelve million, four hundred eighty-one thousand, six hundred sixty-seven".