87665210280 has 256 divisors, whose sum is σ = 298896998400. Its totient is φ = 22844586240.

The previous prime is 87665210261. The next prime is 87665210291. The reversal of 87665210280 is 8201256678.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55378369 + ... + 55379951.

It is an arithmetic number, because the mean of its divisors is an integer number (1167566400).

Almost surely, 2^87665210280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87665210280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149448499200).

87665210280 is an abundant number, since it is smaller than the sum of its proper divisors (211231788120).

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

87665210280 is a wasteful number, since it uses less digits than its factorization.

87665210280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741 (or 2731 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 87665210280 in words is "eighty-seven billion, six hundred sixty-five million, two hundred ten thousand, two hundred eighty".