15461223440561 has 16 divisors (see below), whose sum is σ = 16246667044608. Its totient is φ = 14698688457600.

The previous prime is 15461223440519. The next prime is 15461223440573. The reversal of 15461223440561 is 16504432216451.

It is a happy number.

15461223440561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 15461223440561 - 2¹⁰ = 15461223439537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15461223440591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20767580 + ... + 21499181.

It is an arithmetic number, because the mean of its divisors is an integer number (1015416690288).

Almost surely, 2^{15461223440561} is an apocalyptic number.

It is an amenable number.

15461223440561 is a deficient number, since it is larger than the sum of its proper divisors (785443604047).

15461223440561 is a wasteful number, since it uses less digits than its factorization.

15461223440561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42267032.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 15461223440561 in words is "fifteen trillion, four hundred sixty-one billion, two hundred twenty-three million, four hundred forty thousand, five hundred sixty-one".