18376447779399 has 8 divisors (see below), whose sum is σ = 24526117869552. Its totient is φ = 12238871437760.

The previous prime is 18376447779367. The next prime is 18376447779461. The reversal of 18376447779399 is 99397774467381.

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

It is a cyclic number.

It is not a de Polignac number, because 18376447779399 - 2⁵ = 18376447779367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18376447772399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3023433582 + ... + 3023439659.

It is an arithmetic number, because the mean of its divisors is an integer number (3065764733694).

Almost surely, 2^{18376447779399} is an apocalyptic number.

18376447779399 is a deficient number, since it is larger than the sum of its proper divisors (6149670090153).

18376447779399 is a wasteful number, since it uses less digits than its factorization.

18376447779399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6046874257.

The product of its digits is 12098274048, while the sum is 84.

The spelling of 18376447779399 in words is "eighteen trillion, three hundred seventy-six billion, four hundred forty-seven million, seven hundred seventy-nine thousand, three hundred ninety-nine".