187915712849 has 2 divisors, whose sum is σ = 187915712850. Its totient is φ = 187915712848.

The previous prime is 187915712833. The next prime is 187915712903. The reversal of 187915712849 is 948217519781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184850983249 + 3064729600 = 429943^2 + 55360^2 .

It is a cyclic number.

It is not a de Polignac number, because 187915712849 - 2⁴ = 187915712833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 187915712791 and 187915712800.

It is not a weakly prime, because it can be changed into another prime (187915718849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93957856424 + 93957856425.

It is an arithmetic number, because the mean of its divisors is an integer number (93957856425).

Almost surely, 2^187915712849 is an apocalyptic number.

It is an amenable number.

187915712849 is a deficient number, since it is larger than the sum of its proper divisors (1).

187915712849 is an equidigital number, since it uses as much as digits as its factorization.

187915712849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 62.

The spelling of 187915712849 in words is "one hundred eighty-seven billion, nine hundred fifteen million, seven hundred twelve thousand, eight hundred forty-nine".