81768295 has 16 divisors (see below), whose sum is σ = 112370688. Its totient is φ = 55954080.

The previous prime is 81768293. The next prime is 81768299. The reversal of 81768295 is 59286718.

It is not a de Polignac number, because 81768295 - 2¹ = 81768293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81768293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17010 + ... + 21280.

It is an arithmetic number, because the mean of its divisors is an integer number (7023168).

Almost surely, 2^81768295 is an apocalyptic number.

81768295 is a deficient number, since it is larger than the sum of its proper divisors (30602393).

81768295 is a wasteful number, since it uses less digits than its factorization.

81768295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4830.

The product of its digits is 241920, while the sum is 46.

The square root of 81768295 is about 9042.5823192272. The cubic root of 81768295 is about 434.0385600742.

It can be divided in two parts, 8176 and 8295, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 81768295 in words is "eighty-one million, seven hundred sixty-eight thousand, two hundred ninety-five".