1000865755648 has 160 divisors (see below), whose sum is σ = 2202808779072. Its totient is φ = 450526003200.

The previous prime is 1000865755607. The next prime is 1000865755657. The reversal of 1000865755648 is 8465575680001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452265390 + ... + 452267602.

Almost surely, 2^{1000865755648} 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 1000865755648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1101404389536).

1000865755648 is an abundant number, since it is smaller than the sum of its proper divisors (1201943023424).

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

1000865755648 is a wasteful number, since it uses less digits than its factorization.

1000865755648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986 (or 2970 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 55.

The spelling of 1000865755648 in words is "one trillion, eight hundred sixty-five million, seven hundred fifty-five thousand, six hundred forty-eight".