6389910000981 has 18 divisors (see below), whose sum is σ = 9994474619298. Its totient is φ = 3932252307360.

The previous prime is 6389910000979. The next prime is 6389910000983. The reversal of 6389910000981 is 1890000199836.

It is an interprime number because it is at equal distance from previous prime (6389910000979) and next prime (6389910000983).

It can be written as a sum of positive squares in 3 ways, for example, as 779009238225 + 5610900762756 = 882615^2 + 2368734^2 .

It is not a de Polignac number, because 6389910000981 - 2¹ = 6389910000979 is a prime.

It is a super-2 number, since 2×6389910000981² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6389910000983) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2100560610 + ... + 2100563651.

It is an arithmetic number, because the mean of its divisors is an integer number (555248589961).

Almost surely, 2^{6389910000981} is an apocalyptic number.

It is an amenable number.

6389910000981 is a deficient number, since it is larger than the sum of its proper divisors (3604564618317).

6389910000981 is a wasteful number, since it uses less digits than its factorization.

6389910000981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201124293 (or 4201124277 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The spelling of 6389910000981 in words is "six trillion, three hundred eighty-nine billion, nine hundred ten million, nine hundred eighty-one", and thus it is an aban number.