15778755787783 has 2 divisors, whose sum is σ = 15778755787784. Its totient is φ = 15778755787782.

The previous prime is 15778755787747. The next prime is 15778755787787. The reversal of 15778755787783 is 38778755787751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15778755787783 - 2¹⁷ = 15778755656711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15778755787783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15778755787787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7889377893891 + 7889377893892.

It is an arithmetic number, because the mean of its divisors is an integer number (7889377893892).

Almost surely, 2^{15778755787783} is an apocalyptic number.

15778755787783 is a deficient number, since it is larger than the sum of its proper divisors (1).

15778755787783 is an equidigital number, since it uses as much as digits as its factorization.

15778755787783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22588608000, while the sum is 85.

The spelling of 15778755787783 in words is "fifteen trillion, seven hundred seventy-eight billion, seven hundred fifty-five million, seven hundred eighty-seven thousand, seven hundred eighty-three".