78884042715886 has 4 divisors (see below), whose sum is σ = 118326064073832. Its totient is φ = 39442021357942.

The previous prime is 78884042715833. The next prime is 78884042715941. The reversal of 78884042715886 is 68851724048887.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19721010678970 + ... + 19721010678973.

It is an arithmetic number, because the mean of its divisors is an integer number (29581516018458).

Almost surely, 2^{78884042715886} is an apocalyptic number.

78884042715886 is a deficient number, since it is larger than the sum of its proper divisors (39442021357946).

78884042715886 is a wasteful number, since it uses less digits than its factorization.

78884042715886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39442021357945.

The product of its (nonzero) digits is 1541406720, while the sum is 76.

The spelling of 78884042715886 in words is "seventy-eight trillion, eight hundred eighty-four billion, forty-two million, seven hundred fifteen thousand, eight hundred eighty-six".