84438743678 has 8 divisors (see below), whose sum is σ = 127496911440. Its totient is φ = 41939773200.

The previous prime is 84438743621. The next prime is 84438743707. The reversal of 84438743678 is 87634783448.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 84438743678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139798943 + ... + 139799546.

It is an arithmetic number, because the mean of its divisors is an integer number (15937113930).

Almost surely, 2^84438743678 is an apocalyptic number.

84438743678 is a deficient number, since it is larger than the sum of its proper divisors (43058167762).

84438743678 is a wasteful number, since it uses less digits than its factorization.

84438743678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279598642.

The product of its digits is 86704128, while the sum is 62.

The spelling of 84438743678 in words is "eighty-four billion, four hundred thirty-eight million, seven hundred forty-three thousand, six hundred seventy-eight".