83278144969 has 8 divisors (see below), whose sum is σ = 84158481960. Its totient is φ = 82398253056.

The previous prime is 83278144967. The next prime is 83278144979. The reversal of 83278144969 is 96944187238.

It can be written as a sum of positive squares in 4 ways, for example, as 211411600 + 83066733369 = 14540^2 + 288213^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83278144969 - 2¹ = 83278144967 is a prime.

It is a super-2 number, since 2×83278144969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83278144967) 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 7 ways as a sum of consecutive naturals, for example, 271857 + ... + 490369.

It is an arithmetic number, because the mean of its divisors is an integer number (10519810245).

Almost surely, 2^83278144969 is an apocalyptic number.

It is an amenable number.

83278144969 is a deficient number, since it is larger than the sum of its proper divisors (880336991).

83278144969 is a wasteful number, since it uses less digits than its factorization.

83278144969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222539.

The product of its digits is 20901888, while the sum is 61.

The spelling of 83278144969 in words is "eighty-three billion, two hundred seventy-eight million, one hundred forty-four thousand, nine hundred sixty-nine".