123340523551 has 8 divisors (see below), whose sum is σ = 140970259584. Its totient is φ = 105713202840.

The previous prime is 123340523513. The next prime is 123340523561. The reversal of 123340523551 is 155325043321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123340523551 - 2¹⁵ = 123340490783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123340523561) 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, 493045 + ... + 699838.

It is an arithmetic number, because the mean of its divisors is an integer number (17621282448).

Almost surely, 2^123340523551 is an apocalyptic number.

123340523551 is a deficient number, since it is larger than the sum of its proper divisors (17629736033).

123340523551 is a wasteful number, since it uses less digits than its factorization.

123340523551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207661.

The product of its (nonzero) digits is 54000, while the sum is 34.

Adding to 123340523551 its reverse (155325043321), we get a palindrome (278665566872).

The spelling of 123340523551 in words is "one hundred twenty-three billion, three hundred forty million, five hundred twenty-three thousand, five hundred fifty-one".