18791464618752 has 144 divisors (see below), whose sum is σ = 57165086307840. Its totient is φ = 5368265220096.

The previous prime is 18791464618711. The next prime is 18791464618763. The reversal of 18791464618752 is 25781646419781.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40243773 + ... + 40708035.

Almost surely, 2^{18791464618752} is an apocalyptic number.

18791464618752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18791464618752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28582543153920).

18791464618752 is an abundant number, since it is smaller than the sum of its proper divisors (38373621689088).

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

18791464618752 is an equidigital number, since it uses as much as digits as its factorization.

18791464618752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471818 (or 471804 counting only the distinct ones).

The product of its digits is 162570240, while the sum is 69.

The spelling of 18791464618752 in words is "eighteen trillion, seven hundred ninety-one billion, four hundred sixty-four million, six hundred eighteen thousand, seven hundred fifty-two".