78089435697 has 96 divisors (see below), whose sum is σ = 133269421824. Its totient is φ = 40303872000.

The previous prime is 78089435659. The next prime is 78089435701. The reversal of 78089435697 is 79653498087.

It is not a de Polignac number, because 78089435697 - 2¹² = 78089431601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78089435617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18586197 + ... + 18590397.

It is an arithmetic number, because the mean of its divisors is an integer number (1388223144).

Almost surely, 2^78089435697 is an apocalyptic number.

It is an amenable number.

78089435697 is a deficient number, since it is larger than the sum of its proper divisors (55179986127).

78089435697 is a wasteful number, since it uses less digits than its factorization.

78089435697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4439 (or 4432 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 66.

The spelling of 78089435697 in words is "seventy-eight billion, eighty-nine million, four hundred thirty-five thousand, six hundred ninety-seven".