4000495306581 has 12 divisors (see below), whose sum is σ = 6029732056608. Its totient is φ = 2551040485224.

The previous prime is 4000495306523. The next prime is 4000495306631. The reversal of 4000495306581 is 1856035940004.

It is not a de Polignac number, because 4000495306581 - 2¹⁵ = 4000495273813 is a prime.

It is a super-2 number, since 2×4000495306581² (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 (4000495306981) 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 11 ways as a sum of consecutive naturals, for example, 9663031935 + ... + 9663032348.

It is an arithmetic number, because the mean of its divisors is an integer number (502477671384).

Almost surely, 2^{4000495306581} is an apocalyptic number.

It is an amenable number.

4000495306581 is a deficient number, since it is larger than the sum of its proper divisors (2029236750027).

4000495306581 is a wasteful number, since it uses less digits than its factorization.

4000495306581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19326064312 (or 19326064309 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 4000495306581 in words is "four trillion, four hundred ninety-five million, three hundred six thousand, five hundred eighty-one".