1061536643720 has 128 divisors (see below), whose sum is σ = 2807986348800. Its totient is φ = 353544569856.

The previous prime is 1061536643693. The next prime is 1061536643723. The reversal of 1061536643720 is 273466351601.

It is a super-2 number, since 2×1061536643720² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061536643723) by changing a digit.

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, 6330074 + ... + 6495606.

It is an arithmetic number, because the mean of its divisors is an integer number (21937393350).

Almost surely, 2^{1061536643720} is an apocalyptic number.

1061536643720 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 1061536643720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1403993174400).

1061536643720 is an abundant number, since it is smaller than the sum of its proper divisors (1746449705080).

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

1061536643720 is a wasteful number, since it uses less digits than its factorization.

1061536643720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166207 (or 166203 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 1061536643720 in words is "one trillion, sixty-one billion, five hundred thirty-six million, six hundred forty-three thousand, seven hundred twenty".