87689811544 has 8 divisors (see below), whose sum is σ = 164418396660. Its totient is φ = 43844905768.

The previous prime is 87689811511. The next prime is 87689811607. The reversal of 87689811544 is 44511898678.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 5480613214 + ... + 5480613229.

Almost surely, 2^87689811544 is an apocalyptic number.

It is an amenable number.

87689811544 is a deficient number, since it is larger than the sum of its proper divisors (76728585116).

87689811544 is a wasteful number, since it uses less digits than its factorization.

87689811544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10961226449 (or 10961226445 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 61.

The spelling of 87689811544 in words is "eighty-seven billion, six hundred eighty-nine million, eight hundred eleven thousand, five hundred forty-four".