78072350789 has 4 divisors (see below), whose sum is σ = 79237609824. Its totient is φ = 76907091756.

The previous prime is 78072350779. The next prime is 78072350801. The reversal of 78072350789 is 98705327087.

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 78072350789 - 2²⁰ = 78071302213 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 (78072350749) 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, 582629417 + ... + 582629550.

It is an arithmetic number, because the mean of its divisors is an integer number (19809402456).

Almost surely, 2^78072350789 is an apocalyptic number.

It is an amenable number.

78072350789 is a deficient number, since it is larger than the sum of its proper divisors (1165259035).

78072350789 is a wasteful number, since it uses less digits than its factorization.

78072350789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165259034.

The product of its (nonzero) digits is 5927040, while the sum is 56.

The spelling of 78072350789 in words is "seventy-eight billion, seventy-two million, three hundred fifty thousand, seven hundred eighty-nine".