18791788841457 has 8 divisors (see below), whose sum is σ = 25056599912640. Its totient is φ = 12527418498960.

The previous prime is 18791788841443. The next prime is 18791788841461. The reversal of 18791788841457 is 75414888719781.

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

It is not a de Polignac number, because 18791788841457 - 2²³ = 18791780452849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18791788821457) 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, 110082669 + ... + 110253242.

It is an arithmetic number, because the mean of its divisors is an integer number (3132074989080).

Almost surely, 2^{18791788841457} is an apocalyptic number.

It is an amenable number.

18791788841457 is a deficient number, since it is larger than the sum of its proper divisors (6264811071183).

18791788841457 is a wasteful number, since it uses less digits than its factorization.

18791788841457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220364343.

The product of its digits is 1011548160, while the sum is 78.

The spelling of 18791788841457 in words is "eighteen trillion, seven hundred ninety-one billion, seven hundred eighty-eight million, eight hundred forty-one thousand, four hundred fifty-seven".