87661895329 has 4 divisors (see below), whose sum is σ = 88011146160. Its totient is φ = 87312644500.

The previous prime is 87661895317. The next prime is 87661895341. The reversal of 87661895329 is 92359816678.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (87661895317) and next prime (87661895341).

It is a cyclic number.

It is not a de Polignac number, because 87661895329 - 2¹¹ = 87661893281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87661898329) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 174625039 + ... + 174625540.

It is an arithmetic number, because the mean of its divisors is an integer number (22002786540).

Almost surely, 2^87661895329 is an apocalyptic number.

It is an amenable number.

87661895329 is a deficient number, since it is larger than the sum of its proper divisors (349250831).

87661895329 is a wasteful number, since it uses less digits than its factorization.

87661895329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349250830.

The product of its digits is 39191040, while the sum is 64.

The spelling of 87661895329 in words is "eighty-seven billion, six hundred sixty-one million, eight hundred ninety-five thousand, three hundred twenty-nine".