1020840955560 has 160 divisors (see below), whose sum is σ = 3431632232160. Its totient is φ = 272186780544.

The previous prime is 1020840955513. The next prime is 1020840955571. The reversal of 1020840955560 is 655590480201.

1020840955560 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 8 + 4 + 0 + 95 + 556 + 0 = 666.

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 39 ways as a sum of consecutive naturals, for example, 29878407 + ... + 29912553.

It is an arithmetic number, because the mean of its divisors is an integer number (21447701451).

Almost surely, 2^{1020840955560} is an apocalyptic number.

1020840955560 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 1020840955560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1715816116080).

1020840955560 is an abundant number, since it is smaller than the sum of its proper divisors (2410791276600).

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

1020840955560 is a wasteful number, since it uses less digits than its factorization.

1020840955560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43397 (or 43384 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The spelling of 1020840955560 in words is "one trillion, twenty billion, eight hundred forty million, nine hundred fifty-five thousand, five hundred sixty".