65819377285 has 32 divisors (see below), whose sum is σ = 81446796000. Its totient is φ = 51042140160.

The previous prime is 65819377223. The next prime is 65819377297. The reversal of 65819377285 is 58277391856.

It can be written as a sum of positive squares in 16 ways, for example, as 65414200644 + 405176641 = 255762^2 + 20129^2 .

It is not a de Polignac number, because 65819377285 - 2¹⁹ = 65818852997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8601141 + ... + 8608789.

It is an arithmetic number, because the mean of its divisors is an integer number (2545212375).

Almost surely, 2^65819377285 is an apocalyptic number.

It is an amenable number.

65819377285 is a deficient number, since it is larger than the sum of its proper divisors (15627418715).

65819377285 is a wasteful number, since it uses less digits than its factorization.

65819377285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8121.

The product of its digits is 25401600, while the sum is 61.

The spelling of 65819377285 in words is "sixty-five billion, eight hundred nineteen million, three hundred seventy-seven thousand, two hundred eighty-five".