11872123345 has 4 divisors (see below), whose sum is σ = 14246548020. Its totient is φ = 9497698672.

The previous prime is 11872123337. The next prime is 11872123387. The reversal of 11872123345 is 54332127811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1713297664 + 10158825681 = 41392^2 + 100791^2 .

It is a cyclic number.

It is not a de Polignac number, because 11872123345 - 2³ = 11872123337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187212330 + ... + 1187212339.

It is an arithmetic number, because the mean of its divisors is an integer number (3561637005).

Almost surely, 2^11872123345 is an apocalyptic number.

It is an amenable number.

11872123345 is a deficient number, since it is larger than the sum of its proper divisors (2374424675).

11872123345 is an equidigital number, since it uses as much as digits as its factorization.

11872123345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374424674.

The product of its digits is 40320, while the sum is 37.

The spelling of 11872123345 in words is "eleven billion, eight hundred seventy-two million, one hundred twenty-three thousand, three hundred forty-five".