1007002543681 has 4 divisors (see below), whose sum is σ = 1023510782164. Its totient is φ = 990494305200.

The previous prime is 1007002543669. The next prime is 1007002543717. The reversal of 1007002543681 is 1863452007001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68121000000 + 938881543681 = 261000^2 + 968959^2 .

It is a cyclic number.

It is not a de Polignac number, because 1007002543681 - 2²⁵ = 1006968989249 is a prime.

It is a super-2 number, since 2×1007002543681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1007002543681.

It is not an unprimeable number, because it can be changed into a prime (1007002543621) 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 3 ways as a sum of consecutive naturals, for example, 8254119150 + ... + 8254119271.

It is an arithmetic number, because the mean of its divisors is an integer number (255877695541).

Almost surely, 2^{1007002543681} is an apocalyptic number.

It is an amenable number.

1007002543681 is a deficient number, since it is larger than the sum of its proper divisors (16508238483).

1007002543681 is an equidigital number, since it uses as much as digits as its factorization.

1007002543681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16508238482.

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 1007002543681 in words is "one trillion, seven billion, two million, five hundred forty-three thousand, six hundred eighty-one".