123131343156358 has 16 divisors (see below), whose sum is σ = 192209984376480. Its totient is φ = 59086772965696.

The previous prime is 123131343156343. The next prime is 123131343156359. The reversal of 123131343156358 is 853651343131321.

It is a happy number.

It is a super-2 number, since 2×123131343156358² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123131343156359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6356140591 + ... + 6356159962.

It is an arithmetic number, because the mean of its divisors is an integer number (12013124023530).

Almost surely, 2^{123131343156358} is an apocalyptic number.

123131343156358 is a deficient number, since it is larger than the sum of its proper divisors (69078641220122).

123131343156358 is a wasteful number, since it uses less digits than its factorization.

123131343156358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12712300751.

The product of its digits is 2332800, while the sum is 49.

Adding to 123131343156358 its reverse (853651343131321), we get a palindrome (976782686287679).

The spelling of 123131343156358 in words is "one hundred twenty-three trillion, one hundred thirty-one billion, three hundred forty-three million, one hundred fifty-six thousand, three hundred fifty-eight".