78439088002 has 32 divisors (see below), whose sum is σ = 135606078720. Its totient is φ = 33692225280.

The previous prime is 78439087997. The next prime is 78439088003. The reversal of 78439088002 is 20088093487.

It is not an unprimeable number, because it can be changed into a prime (78439088003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1277943 + ... + 1337914.

It is an arithmetic number, because the mean of its divisors is an integer number (4237689960).

Almost surely, 2^78439088002 is an apocalyptic number.

78439088002 is a deficient number, since it is larger than the sum of its proper divisors (57166990718).

78439088002 is a wasteful number, since it uses less digits than its factorization.

78439088002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2615946.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 78439088002 in words is "seventy-eight billion, four hundred thirty-nine million, eighty-eight thousand, two".