18787439551151 has 2 divisors, whose sum is σ = 18787439551152. Its totient is φ = 18787439551150.

The previous prime is 18787439551091. The next prime is 18787439551163. The reversal of 18787439551151 is 15115593478781.

It is a strong prime.

It is an emirp because it is prime and its reverse (15115593478781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18787439551151 - 2⁶ = 18787439551087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18787433551151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9393719775575 + 9393719775576.

It is an arithmetic number, because the mean of its divisors is an integer number (9393719775576).

Almost surely, 2^{18787439551151} is an apocalyptic number.

18787439551151 is a deficient number, since it is larger than the sum of its proper divisors (1).

18787439551151 is an equidigital number, since it uses as much as digits as its factorization.

18787439551151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336000, while the sum is 65.

The spelling of 18787439551151 in words is "eighteen trillion, seven hundred eighty-seven billion, four hundred thirty-nine million, five hundred fifty-one thousand, one hundred fifty-one".