7816123923 has 8 divisors (see below), whose sum is σ = 10643232768. Its totient is φ = 5099882184.

The previous prime is 7816123921. The next prime is 7816123927. The reversal of 7816123923 is 3293216187.

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

It is not a de Polignac number, because 7816123923 - 2¹ = 7816123921 is a prime.

It is a super-2 number, since 2×7816123923² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (7816123921) 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, 27716611 + ... + 27716892.

It is an arithmetic number, because the mean of its divisors is an integer number (1330404096).

Almost surely, 2^7816123923 is an apocalyptic number.

7816123923 is a deficient number, since it is larger than the sum of its proper divisors (2827108845).

7816123923 is a wasteful number, since it uses less digits than its factorization.

7816123923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55433553.

The product of its digits is 108864, while the sum is 42.

The square root of 7816123923 is about 88408.8452757981. The cubic root of 7816123923 is about 1984.5580738902.

The spelling of 7816123923 in words is "seven billion, eight hundred sixteen million, one hundred twenty-three thousand, nine hundred twenty-three".