87910811520 has 128 divisors (see below), whose sum is σ = 320246576640. Its totient is φ = 20093896704.

The previous prime is 87910811509. The next prime is 87910811543. The reversal of 87910811520 is 2511801978.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

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 15 ways as a sum of consecutive naturals, for example, 3257052 + ... + 3283931.

It is an arithmetic number, because the mean of its divisors is an integer number (2501926380).

Almost surely, 2^87910811520 is an apocalyptic number.

87910811520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87910811520 is an abundant number, since it is smaller than the sum of its proper divisors (232335765120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87910811520 is a wasteful number, since it uses less digits than its factorization.

87910811520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6541012 (or 6541000 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 42.

The spelling of 87910811520 in words is "eighty-seven billion, nine hundred ten million, eight hundred eleven thousand, five hundred twenty".