1006909436681 has 4 divisors (see below), whose sum is σ = 1006912679952. Its totient is φ = 1006906193412.

The previous prime is 1006909436677. The next prime is 1006909436699. The reversal of 1006909436681 is 1866349096001.

1006909436681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1006909436681 - 2² = 1006909436677 is a prime.

It is a super-2 number, since 2×1006909436681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1006909436651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1100015 + ... + 1795508.

It is an arithmetic number, because the mean of its divisors is an integer number (251728169988).

Almost surely, 2^{1006909436681} is an apocalyptic number.

It is an amenable number.

1006909436681 is a deficient number, since it is larger than the sum of its proper divisors (3243271).

1006909436681 is an equidigital number, since it uses as much as digits as its factorization.

1006909436681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243270.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 1006909436681 in words is "one trillion, six billion, nine hundred nine million, four hundred thirty-six thousand, six hundred eighty-one".