17978411078 has 16 divisors (see below), whose sum is σ = 28543809840. Its totient is φ = 8469036000.

The previous prime is 17978411057. The next prime is 17978411089. The reversal of 17978411078 is 87011487971.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1300073 + ... + 1313828.

It is an arithmetic number, because the mean of its divisors is an integer number (1783988115).

Almost surely, 2^17978411078 is an apocalyptic number.

17978411078 is a deficient number, since it is larger than the sum of its proper divisors (10565398762).

17978411078 is a wasteful number, since it uses less digits than its factorization.

17978411078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614103.

The product of its (nonzero) digits is 790272, while the sum is 53.

The spelling of 17978411078 in words is "seventeen billion, nine hundred seventy-eight million, four hundred eleven thousand, seventy-eight".