78002485189 has 4 divisors (see below), whose sum is σ = 78223455756. Its totient is φ = 77781514624.

The previous prime is 78002485181. The next prime is 78002485207. The reversal of 78002485189 is 98158420087.

It is a happy number.

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 46306736100 + 31695749089 = 215190^2 + 178033^2 .

It is a cyclic number.

It is not a de Polignac number, because 78002485189 - 2³ = 78002485181 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 (78002485181) 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, 110484754 + ... + 110485459.

It is an arithmetic number, because the mean of its divisors is an integer number (19555863939).

Almost surely, 2^78002485189 is an apocalyptic number.

It is an amenable number.

78002485189 is a deficient number, since it is larger than the sum of its proper divisors (220970567).

78002485189 is a wasteful number, since it uses less digits than its factorization.

78002485189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220970566.

The product of its (nonzero) digits is 1290240, while the sum is 52.

The spelling of 78002485189 in words is "seventy-eight billion, two million, four hundred eighty-five thousand, one hundred eighty-nine".