15266878461787 has 2 divisors, whose sum is σ = 15266878461788. Its totient is φ = 15266878461786.

The previous prime is 15266878461763. The next prime is 15266878461823. The reversal of 15266878461787 is 78716487866251.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15266878461787 - 2¹⁹ = 15266877937499 is a prime.

It is not a weakly prime, because it can be changed into another prime (15266878467787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7633439230893 + 7633439230894.

It is an arithmetic number, because the mean of its divisors is an integer number (7633439230894).

Almost surely, 2^{15266878461787} is an apocalyptic number.

15266878461787 is a deficient number, since it is larger than the sum of its proper divisors (1).

15266878461787 is an equidigital number, since it uses as much as digits as its factorization.

15266878461787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1517322240, while the sum is 76.

The spelling of 15266878461787 in words is "fifteen trillion, two hundred sixty-six billion, eight hundred seventy-eight million, four hundred sixty-one thousand, seven hundred eighty-seven".