1061555978884 has 24 divisors (see below), whose sum is σ = 1907985968280. Its totient is φ = 516417947136.

The previous prime is 1061555978783. The next prime is 1061555978897. The reversal of 1061555978884 is 4888795551601.

It can be written as a sum of positive squares in 4 ways, for example, as 34272376384 + 1027283602500 = 185128^2 + 1013550^2 .

It is a super-3 number, since 3×1061555978884³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 7 ways as a sum of consecutive naturals, for example, 6600822 + ... + 6759730.

It is an arithmetic number, because the mean of its divisors is an integer number (79499415345).

Almost surely, 2^{1061555978884} is an apocalyptic number.

It is an amenable number.

1061555978884 is a deficient number, since it is larger than the sum of its proper divisors (846429989396).

1061555978884 is a wasteful number, since it uses less digits than its factorization.

1061555978884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204087 (or 204085 counting only the distinct ones).

The product of its (nonzero) digits is 96768000, while the sum is 67.

The spelling of 1061555978884 in words is "one trillion, sixty-one billion, five hundred fifty-five million, nine hundred seventy-eight thousand, eight hundred eighty-four".