19168679401 has 3 divisors (see below), whose sum is σ = 19168817853. Its totient is φ = 19168540950.

The previous prime is 19168679381. The next prime is 19168679419. The reversal of 19168679401 is 10497686191.

The square root of 19168679401 is 138451.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 19168679401 - 2⁹ = 19168678889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19168677401) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 69226 + ... + 207676.

It is an arithmetic number, because the mean of its divisors is an integer number (6389605951).

Almost surely, 2^19168679401 is an apocalyptic number.

19168679401 is the 138451-st square number.

19168679401 is the 69226-th centered octagonal number.

It is an amenable number.

19168679401 is a deficient number, since it is larger than the sum of its proper divisors (138452).

19168679401 is an frugal number, since it uses more digits than its factorization.

19168679401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276902 (or 138451 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 19168679401 in words is "nineteen billion, one hundred sixty-eight million, six hundred seventy-nine thousand, four hundred one".