19026660078 has 80 divisors (see below), whose sum is σ = 44918375040. Its totient is φ = 6002974800.

The previous prime is 19026660061. The next prime is 19026660091. The reversal of 19026660078 is 87006662091.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4648813 + ... + 4652903.

It is an arithmetic number, because the mean of its divisors is an integer number (561479688).

Almost surely, 2^19026660078 is an apocalyptic number.

19026660078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19026660078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22459187520).

19026660078 is an abundant number, since it is smaller than the sum of its proper divisors (25891714962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19026660078 is a wasteful number, since it uses less digits than its factorization.

19026660078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5635 (or 5626 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 19026660078 in words is "nineteen billion, twenty-six million, six hundred sixty thousand, seventy-eight".