17143981380 has 144 divisors (see below), whose sum is σ = 52831462320. Its totient is φ = 4499214336.

The previous prime is 17143981343. The next prime is 17143981403. The reversal of 17143981380 is 8318934171.

17143981380 is a `hidden beast` number, since 171 + 4 + 398 + 13 + 80 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1789797636 + 15354183744 = 42306^2 + 123912^2 .

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, 7475514 + ... + 7477806.

It is an arithmetic number, because the mean of its divisors is an integer number (366885155).

Almost surely, 2^17143981380 is an apocalyptic number.

17143981380 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 17143981380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26415731160).

17143981380 is an abundant number, since it is smaller than the sum of its proper divisors (35687480940).

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

17143981380 is a wasteful number, since it uses less digits than its factorization.

17143981380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950 (or 2945 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 17143981380 in words is "seventeen billion, one hundred forty-three million, nine hundred eighty-one thousand, three hundred eighty".