1016878865640 has 128 divisors (see below), whose sum is σ = 3329522236800. Its totient is φ = 246400901120.

The previous prime is 1016878865621. The next prime is 1016878865677. The reversal of 1016878865640 is 465688786101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2663056 + ... + 3020864.

It is an arithmetic number, because the mean of its divisors is an integer number (26011892475).

Almost surely, 2^{1016878865640} is an apocalyptic number.

1016878865640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1016878865640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1664761118400).

1016878865640 is an abundant number, since it is smaller than the sum of its proper divisors (2312643371160).

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

1016878865640 is a wasteful number, since it uses less digits than its factorization.

1016878865640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359987 (or 359983 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 60.

The spelling of 1016878865640 in words is "one trillion, sixteen billion, eight hundred seventy-eight million, eight hundred sixty-five thousand, six hundred forty".