17979489644390 has 8 divisors (see below), whose sum is σ = 32363081359920. Its totient is φ = 7191795857752.

The previous prime is 17979489644381. The next prime is 17979489644401. The reversal of 17979489644390 is 9344698497971.

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

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, 898974482210 + ... + 898974482229.

It is an arithmetic number, because the mean of its divisors is an integer number (4045385169990).

Almost surely, 2^{17979489644390} is an apocalyptic number.

17979489644390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

17979489644390 is a deficient number, since it is larger than the sum of its proper divisors (14383591715530).

17979489644390 is a wasteful number, since it uses less digits than its factorization.

17979489644390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797948964446.

The product of its (nonzero) digits is 2962842624, while the sum is 80.

The spelling of 17979489644390 in words is "seventeen trillion, nine hundred seventy-nine billion, four hundred eighty-nine million, six hundred forty-four thousand, three hundred ninety".