123040402345 has 16 divisors (see below), whose sum is σ = 168754929408. Its totient is φ = 84363658560.

The previous prime is 123040402337. The next prime is 123040402357. The reversal of 123040402345 is 543204040321.

It is a happy number.

It is not a de Polignac number, because 123040402345 - 2³ = 123040402337 is a prime.

It is a Duffinian number.

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, 310267 + ... + 585103.

It is an arithmetic number, because the mean of its divisors is an integer number (10547183088).

Almost surely, 2^123040402345 is an apocalyptic number.

It is an amenable number.

123040402345 is a deficient number, since it is larger than the sum of its proper divisors (45714527063).

123040402345 is a wasteful number, since it uses less digits than its factorization.

123040402345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287640.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 123040402345 its reverse (543204040321), we get a palindrome (666244442666).

The spelling of 123040402345 in words is "one hundred twenty-three billion, forty million, four hundred two thousand, three hundred forty-five".