18715877320463 has 8 divisors (see below), whose sum is σ = 19162944745296. Its totient is φ = 18269346916800.

The previous prime is 18715877320429. The next prime is 18715877320507. The reversal of 18715877320463 is 36402377851781.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18715877320463 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18715877320396 and 18715877320405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18715877320363) 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, 134184758 + ... + 134324163.

It is an arithmetic number, because the mean of its divisors is an integer number (2395368093162).

Almost surely, 2^{18715877320463} is an apocalyptic number.

18715877320463 is a deficient number, since it is larger than the sum of its proper divisors (447067424833).

18715877320463 is a wasteful number, since it uses less digits than its factorization.

18715877320463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268510585.

The product of its (nonzero) digits is 47416320, while the sum is 62.

The spelling of 18715877320463 in words is "eighteen trillion, seven hundred fifteen billion, eight hundred seventy-seven million, three hundred twenty thousand, four hundred sixty-three".