78511075603 has 4 divisors (see below), whose sum is σ = 80425979928. Its totient is φ = 76596171280.

The previous prime is 78511075589. The next prime is 78511075691. The reversal of 78511075603 is 30657011587.

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 78511075603 - 2³³ = 69921141011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78511075603.

It is not an unprimeable number, because it can be changed into a prime (78511075003) 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, 957452101 + ... + 957452182.

It is an arithmetic number, because the mean of its divisors is an integer number (20106494982).

Almost surely, 2^78511075603 is an apocalyptic number.

78511075603 is a deficient number, since it is larger than the sum of its proper divisors (1914904325).

78511075603 is a wasteful number, since it uses less digits than its factorization.

78511075603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914904324.

The product of its (nonzero) digits is 176400, while the sum is 43.

The spelling of 78511075603 in words is "seventy-eight billion, five hundred eleven million, seventy-five thousand, six hundred three".