76532721165 has 24 divisors (see below), whose sum is σ = 132673184280. Its totient is φ = 40812384384.

The previous prime is 76532721131. The next prime is 76532721197. The reversal of 76532721165 is 56112723567.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21890386116 + 54642335049 = 147954^2 + 233757^2 .

It is not a de Polignac number, because 76532721165 - 2⁷ = 76532721037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 76532721165.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276139 + ... + 478871.

It is an arithmetic number, because the mean of its divisors is an integer number (5528049345).

Almost surely, 2^76532721165 is an apocalyptic number.

It is an amenable number.

76532721165 is a deficient number, since it is larger than the sum of its proper divisors (56140463115).

76532721165 is a wasteful number, since it uses less digits than its factorization.

76532721165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211133 (or 211130 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The spelling of 76532721165 in words is "seventy-six billion, five hundred thirty-two million, seven hundred twenty-one thousand, one hundred sixty-five".