12705483780 has 144 divisors (see below), whose sum is σ = 42221088000. Its totient is φ = 3067115520.

The previous prime is 12705483731. The next prime is 12705483803. The reversal of 12705483780 is 8738450721.

12705483780 is a `hidden beast` number, since 1 + 2 + 70 + 548 + 37 + 8 + 0 = 666.

It is a super-2 number, since 2×12705483780² (a number of 21 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 459796 + ... + 486644.

It is an arithmetic number, because the mean of its divisors is an integer number (293202000).

Almost surely, 2^12705483780 is an apocalyptic number.

12705483780 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 12705483780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21110544000).

12705483780 is an abundant number, since it is smaller than the sum of its proper divisors (29515604220).

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

12705483780 is a wasteful number, since it uses less digits than its factorization.

12705483780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27114 (or 27109 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 12705483780 in words is "twelve billion, seven hundred five million, four hundred eighty-three thousand, seven hundred eighty".