78384387589 has 4 divisors (see below), whose sum is σ = 79488393120. Its totient is φ = 77280382060.

The previous prime is 78384387583. The next prime is 78384387667. The reversal of 78384387589 is 98578348387.

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 78384387589 - 2³ = 78384387581 is a prime.

It is a super-2 number, since 2×78384387589² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78384387581) 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, 552002659 + ... + 552002800.

It is an arithmetic number, because the mean of its divisors is an integer number (19872098280).

Almost surely, 2^78384387589 is an apocalyptic number.

It is an amenable number.

78384387589 is a deficient number, since it is larger than the sum of its proper divisors (1104005531).

78384387589 is a wasteful number, since it uses less digits than its factorization.

78384387589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104005530.

The product of its digits is 325140480, while the sum is 70.

The spelling of 78384387589 in words is "seventy-eight billion, three hundred eighty-four million, three hundred eighty-seven thousand, five hundred eighty-nine".