123156430361 has 4 divisors (see below), whose sum is σ = 128511057792. Its totient is φ = 117801802932.

The previous prime is 123156430357. The next prime is 123156430373. The reversal of 123156430361 is 163034651321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123156430361 - 2² = 123156430357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123156430321) 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, 2677313681 + ... + 2677313726.

It is an arithmetic number, because the mean of its divisors is an integer number (32127764448).

Almost surely, 2^123156430361 is an apocalyptic number.

It is an amenable number.

123156430361 is a deficient number, since it is larger than the sum of its proper divisors (5354627431).

123156430361 is an equidigital number, since it uses as much as digits as its factorization.

123156430361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5354627430.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 123156430361 in words is "one hundred twenty-three billion, one hundred fifty-six million, four hundred thirty thousand, three hundred sixty-one".