40344380261 has 4 divisors (see below), whose sum is σ = 40714512300. Its totient is φ = 39974248224.

The previous prime is 40344380249. The next prime is 40344380291. The reversal of 40344380261 is 16208344304.

40344380261 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.

It can be written as a sum of positive squares in 2 ways, for example, as 10202212036 + 30142168225 = 101006^2 + 173615^2 .

It is a cyclic number.

It is not a de Polignac number, because 40344380261 - 2¹⁰ = 40344379237 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 (40344380291) 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, 185065856 + ... + 185066073.

It is an arithmetic number, because the mean of its divisors is an integer number (10178628075).

Almost surely, 2^40344380261 is an apocalyptic number.

It is an amenable number.

40344380261 is a deficient number, since it is larger than the sum of its proper divisors (370132039).

40344380261 is a wasteful number, since it uses less digits than its factorization.

40344380261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370132038.

The product of its (nonzero) digits is 55296, while the sum is 35.

The spelling of 40344380261 in words is "forty billion, three hundred forty-four million, three hundred eighty thousand, two hundred sixty-one".