10809645780 has 96 divisors (see below), whose sum is σ = 30564293760. Its totient is φ = 2854359040.

The previous prime is 10809645739. The next prime is 10809645797. The reversal of 10809645780 is 8754690801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4471132 + ... + 4473548.

It is an arithmetic number, because the mean of its divisors is an integer number (318378060).

Almost surely, 2^10809645780 is an apocalyptic number.

10809645780 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 10809645780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15282146880).

10809645780 is an abundant number, since it is smaller than the sum of its proper divisors (19754647980).

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

10809645780 is a wasteful number, since it uses less digits than its factorization.

10809645780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3129 (or 3127 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 10809645780 in words is "ten billion, eight hundred nine million, six hundred forty-five thousand, seven hundred eighty".