40017312757621 has 8 divisors (see below), whose sum is σ = 40027044217688. Its totient is φ = 40007582208000.

The previous prime is 40017312757619. The next prime is 40017312757679. The reversal of 40017312757621 is 12675721371004.

40017312757621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19832860628100 + 20184452129521 = 4453410^2 + 4492711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40017312757621 - 2¹ = 40017312757619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40017312757321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92210581 + ... + 92643541.

It is an arithmetic number, because the mean of its divisors is an integer number (5003380527211).

Almost surely, 2^{40017312757621} is an apocalyptic number.

It is an amenable number.

40017312757621 is a deficient number, since it is larger than the sum of its proper divisors (9731460067).

40017312757621 is a wasteful number, since it uses less digits than its factorization.

40017312757621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455223.

The product of its (nonzero) digits is 493920, while the sum is 46.

The spelling of 40017312757621 in words is "forty trillion, seventeen billion, three hundred twelve million, seven hundred fifty-seven thousand, six hundred twenty-one".