78233369923 has 4 divisors (see below), whose sum is σ = 78250572400. Its totient is φ = 78216167448.

The previous prime is 78233369917. The next prime is 78233369969. The reversal of 78233369923 is 32996333287.

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

It is a cyclic number.

It is not a de Polignac number, because 78233369923 - 2⁹ = 78233369411 is a prime.

It is a super-2 number, since 2×78233369923² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78233369723) 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, 8594415 + ... + 8603512.

It is an arithmetic number, because the mean of its divisors is an integer number (19562643100).

Almost surely, 2^78233369923 is an apocalyptic number.

78233369923 is a deficient number, since it is larger than the sum of its proper divisors (17202477).

78233369923 is a wasteful number, since it uses less digits than its factorization.

78233369923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17202476.

The product of its digits is 8817984, while the sum is 55.

The spelling of 78233369923 in words is "seventy-eight billion, two hundred thirty-three million, three hundred sixty-nine thousand, nine hundred twenty-three".