187728770507 has 2 divisors, whose sum is σ = 187728770508. Its totient is φ = 187728770506.

The previous prime is 187728770479. The next prime is 187728770513. The reversal of 187728770507 is 705077827781.

It is a strong prime.

It is an emirp because it is prime and its reverse (705077827781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 187728770507 - 2⁶ = 187728770443 is a prime.

It is not a weakly prime, because it can be changed into another prime (187728770527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93864385253 + 93864385254.

It is an arithmetic number, because the mean of its divisors is an integer number (93864385254).

Almost surely, 2^187728770507 is an apocalyptic number.

187728770507 is a deficient number, since it is larger than the sum of its proper divisors (1).

187728770507 is an equidigital number, since it uses as much as digits as its factorization.

187728770507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10756480, while the sum is 59.

The spelling of 187728770507 in words is "one hundred eighty-seven billion, seven hundred twenty-eight million, seven hundred seventy thousand, five hundred seven".