123354320451 has 16 divisors (see below), whose sum is σ = 165044791296. Its totient is φ = 81950333696.

The previous prime is 123354320399. The next prime is 123354320471. The reversal of 123354320451 is 154023453321.

It is a cyclic number.

It is not a de Polignac number, because 123354320451 - 2¹⁸ = 123354058307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123354320471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1639606 + ... + 1713188.

It is an arithmetic number, because the mean of its divisors is an integer number (10315299456).

Almost surely, 2^123354320451 is an apocalyptic number.

123354320451 is a deficient number, since it is larger than the sum of its proper divisors (41690470845).

123354320451 is a wasteful number, since it uses less digits than its factorization.

123354320451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75522.

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 123354320451 its reverse (154023453321), we get a palindrome (277377773772).

The spelling of 123354320451 in words is "one hundred twenty-three billion, three hundred fifty-four million, three hundred twenty thousand, four hundred fifty-one".