40344023261161 has 4 divisors (see below), whose sum is σ = 40458312279252. Its totient is φ = 40229734243072.

The previous prime is 40344023261077. The next prime is 40344023261203. The reversal of 40344023261161 is 16116232044304.

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 5027151421161 + 35316871840000 = 2242131^2 + 5942800^2 .

It is a cyclic number.

It is not a de Polignac number, because 40344023261161 - 2⁹ = 40344023260649 is a prime.

It is a super-2 number, since 2×40344023261161² (a number of 28 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 40344023261161.

It is not an unprimeable number, because it can be changed into a prime (40344023261461) 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, 57144508516 + ... + 57144509221.

It is an arithmetic number, because the mean of its divisors is an integer number (10114578069813).

Almost surely, 2^{40344023261161} is an apocalyptic number.

It is an amenable number.

40344023261161 is a deficient number, since it is larger than the sum of its proper divisors (114289018091).

40344023261161 is a wasteful number, since it uses less digits than its factorization.

40344023261161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114289018090.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 40344023261161 in words is "forty trillion, three hundred forty-four billion, twenty-three million, two hundred sixty-one thousand, one hundred sixty-one".