1252777166887 has 2 divisors, whose sum is σ = 1252777166888. Its totient is φ = 1252777166886.

The previous prime is 1252777166881. The next prime is 1252777166911. The reversal of 1252777166887 is 7886617772521.

It is a weak prime.

It is an emirp because it is prime and its reverse (7886617772521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1252777166887 - 2¹⁹ = 1252776642599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252777166881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626388583443 + 626388583444.

It is an arithmetic number, because the mean of its divisors is an integer number (626388583444).

Almost surely, 2^{1252777166887} is an apocalyptic number.

1252777166887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252777166887 is an equidigital number, since it uses as much as digits as its factorization.

1252777166887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110638080, while the sum is 67.

The spelling of 1252777166887 in words is "one trillion, two hundred fifty-two billion, seven hundred seventy-seven million, one hundred sixty-six thousand, eight hundred eighty-seven".