561454606454165 has 16 divisors (see below), whose sum is σ = 690239312780976. Its totient is φ = 438169763942400.

The previous prime is 561454606454123. The next prime is 561454606454191.

It is a happy number.

561454606454165 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 8 ways, for example, as 210448348758244 + 351006257695921 = 14506838^2 + 18735161^2 .

It is a de Polignac number, because none of the positive numbers 2^k-561454606454165 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 561454606454098 and 561454606454107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118640372 + ... + 123281981.

It is an arithmetic number, because the mean of its divisors is an integer number (43139957048811).

Almost surely, 2^{561454606454165} is an apocalyptic number.

It is an amenable number.

561454606454165 is a deficient number, since it is larger than the sum of its proper divisors (128784706326811).

561454606454165 is a wasteful number, since it uses less digits than its factorization.

561454606454165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241933720.

The product of its (nonzero) digits is 207360000, while the sum is 62.

The spelling of 561454606454165 in words is "five hundred sixty-one trillion, four hundred fifty-four billion, six hundred six million, four hundred fifty-four thousand, one hundred sixty-five".