6978109087558 has 48 divisors (see below), whose sum is σ = 12452114540880. Its totient is φ = 2923547364864.

The previous prime is 6978109087531. The next prime is 6978109087589. The reversal of 6978109087558 is 8557809018796.

It is a Harshad number since it is a multiple of its sum of digits (73).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3507588 + ... + 5124391.

It is an arithmetic number, because the mean of its divisors is an integer number (259419052935).

Almost surely, 2^{6978109087558} is an apocalyptic number.

6978109087558 is a deficient number, since it is larger than the sum of its proper divisors (5474005453322).

6978109087558 is a wasteful number, since it uses less digits than its factorization.

6978109087558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8632181 (or 8632174 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 73.

The spelling of 6978109087558 in words is "six trillion, nine hundred seventy-eight billion, one hundred nine million, eighty-seven thousand, five hundred fifty-eight".