10195816987 has 2 divisors, whose sum is σ = 10195816988. Its totient is φ = 10195816986.

The previous prime is 10195816979. The next prime is 10195816999. The reversal of 10195816987 is 78961859101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10195816987 - 2³ = 10195816979 is a prime.

It is not a weakly prime, because it can be changed into another prime (10195816927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5097908493 + 5097908494.

It is an arithmetic number, because the mean of its divisors is an integer number (5097908494).

Almost surely, 2^10195816987 is an apocalyptic number.

10195816987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10195816987 is an equidigital number, since it uses as much as digits as its factorization.

10195816987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 55.

The spelling of 10195816987 in words is "ten billion, one hundred ninety-five million, eight hundred sixteen thousand, nine hundred eighty-seven".