1011720050560 has 128 divisors (see below), whose sum is σ = 2424902508000. Its totient is φ = 403642515456.

The previous prime is 1011720050543. The next prime is 1011720050563. The reversal of 1011720050560 is 650500271101.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011720050563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 774077427 + ... + 774078733.

Almost surely, 2^{1011720050560} is an apocalyptic number.

1011720050560 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 1011720050560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1212451254000).

1011720050560 is an abundant number, since it is smaller than the sum of its proper divisors (1413182457440).

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

1011720050560 is a wasteful number, since it uses less digits than its factorization.

1011720050560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3528 (or 3516 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 28.

The spelling of 1011720050560 in words is "one trillion, eleven billion, seven hundred twenty million, fifty thousand, five hundred sixty".