78825445734433 has 4 divisors (see below), whose sum is σ = 78834273769540. Its totient is φ = 78816617699328.

The previous prime is 78825445734337. The next prime is 78825445734461. The reversal of 78825445734433 is 33443754452887.

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 5660483197329 + 73164962537104 = 2379177^2 + 8553652^2 .

It is a cyclic number.

It is not a de Polignac number, because 78825445734433 - 2⁹ = 78825445733921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78825445734463) 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, 4414004160 + ... + 4414022017.

It is an arithmetic number, because the mean of its divisors is an integer number (19708568442385).

Almost surely, 2^{78825445734433} is an apocalyptic number.

It is an amenable number.

78825445734433 is a deficient number, since it is larger than the sum of its proper divisors (8828035107).

78825445734433 is an equidigital number, since it uses as much as digits as its factorization.

78825445734433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8828035106.

The product of its digits is 1083801600, while the sum is 67.

The spelling of 78825445734433 in words is "seventy-eight trillion, eight hundred twenty-five billion, four hundred forty-five million, seven hundred thirty-four thousand, four hundred thirty-three".