123351143665 has 16 divisors (see below), whose sum is σ = 148339399680. Its totient is φ = 98469043200.

The previous prime is 123351143609. The next prime is 123351143687. The reversal of 123351143665 is 566341153321.

It is a de Polignac number, because none of the positive numbers 2^k-123351143665 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8298490 + ... + 8313340.

It is an arithmetic number, because the mean of its divisors is an integer number (9271212480).

Almost surely, 2^123351143665 is an apocalyptic number.

It is an amenable number.

123351143665 is a deficient number, since it is larger than the sum of its proper divisors (24988256015).

123351143665 is a wasteful number, since it uses less digits than its factorization.

123351143665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18312.

The product of its digits is 194400, while the sum is 40.

Adding to 123351143665 its reverse (566341153321), we get a palindrome (689692296986).

The spelling of 123351143665 in words is "one hundred twenty-three billion, three hundred fifty-one million, one hundred forty-three thousand, six hundred sixty-five".