123418232551 has 4 divisors (see below), whose sum is σ = 123419015104. Its totient is φ = 123417450000.

The previous prime is 123418232537. The next prime is 123418232557. The reversal of 123418232551 is 155232814321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 155232814321 = 13 ⋅11940985717.

It is a cyclic number.

It is not a de Polignac number, because 123418232551 - 2⁷ = 123418232423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123418232551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123418232557) 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, 62775 + ... + 500776.

It is an arithmetic number, because the mean of its divisors is an integer number (30854753776).

Almost surely, 2^123418232551 is an apocalyptic number.

123418232551 is a deficient number, since it is larger than the sum of its proper divisors (782553).

123418232551 is an equidigital number, since it uses as much as digits as its factorization.

123418232551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782552.

The product of its digits is 57600, while the sum is 37.

The spelling of 123418232551 in words is "one hundred twenty-three billion, four hundred eighteen million, two hundred thirty-two thousand, five hundred fifty-one".