87758779329 has 48 divisors (see below), whose sum is σ = 144637535952. Its totient is φ = 50795679744.

The previous prime is 87758779279. The next prime is 87758779333. The reversal of 87758779329 is 92397785778.

87758779329 is a `hidden beast` number, since 8 + 7 + 7 + 587 + 7 + 9 + 32 + 9 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 5661057600 + 82097721729 = 75240^2 + 286527^2 .

It is not a de Polignac number, because 87758779329 - 2⁷ = 87758779201 is a prime.

It is a super-2 number, since 2×87758779329² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87758779379) 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 47 ways as a sum of consecutive naturals, for example, 3242517 + ... + 3269469.

It is an arithmetic number, because the mean of its divisors is an integer number (3013281999).

Almost surely, 2^87758779329 is an apocalyptic number.

It is an amenable number.

87758779329 is a deficient number, since it is larger than the sum of its proper divisors (56878756623).

87758779329 is a wasteful number, since it uses less digits than its factorization.

87758779329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28626 (or 28623 counting only the distinct ones).

The product of its digits is 373403520, while the sum is 72.

The spelling of 87758779329 in words is "eighty-seven billion, seven hundred fifty-eight million, seven hundred seventy-nine thousand, three hundred twenty-nine".