78045259423 has 4 divisors (see below), whose sum is σ = 78046179328. Its totient is φ = 78044339520.

The previous prime is 78045259393. The next prime is 78045259451. The reversal of 78045259423 is 32495254087.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32495254087 = 29 ⋅1120526003.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78045259423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78045259823) 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, 318111 + ... + 507232.

It is an arithmetic number, because the mean of its divisors is an integer number (19511544832).

Almost surely, 2^78045259423 is an apocalyptic number.

78045259423 is a deficient number, since it is larger than the sum of its proper divisors (919905).

78045259423 is an equidigital number, since it uses as much as digits as its factorization.

78045259423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919904.

The product of its (nonzero) digits is 2419200, while the sum is 49.

The spelling of 78045259423 in words is "seventy-eight billion, forty-five million, two hundred fifty-nine thousand, four hundred twenty-three".