40244531561 has 8 divisors (see below), whose sum is σ = 43723808520. Its totient is φ = 36820046592.

The previous prime is 40244531557. The next prime is 40244531599. The reversal of 40244531561 is 16513544204.

40244531561 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 5018872336 + 35225659225 = 70844^2 + 187685^2 .

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 40244531561 - 2² = 40244531557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40244531501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13696466 + ... + 13699403.

It is an arithmetic number, because the mean of its divisors is an integer number (5465476065).

Almost surely, 2^40244531561 is an apocalyptic number.

It is an amenable number.

40244531561 is a deficient number, since it is larger than the sum of its proper divisors (3479276959).

40244531561 is a wasteful number, since it uses less digits than its factorization.

40244531561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27395995.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 40244531561 in words is "forty billion, two hundred forty-four million, five hundred thirty-one thousand, five hundred sixty-one".