4173518040561 has 15 divisors (see below), whose sum is σ = 6234542069833. Its totient is φ = 2782333102860.

The previous prime is 4173518040533. The next prime is 4173518040641. The reversal of 4173518040561 is 1650408153714.

The square root of 4173518040561 is 2042919.

It is a perfect power (a square), and thus also a powerful number.

4173518040561 is a `hidden beast` number, since 4 + 1 + 7 + 3 + 5 + 1 + 80 + 4 + 0 + 561 = 666.

It is not a de Polignac number, because 4173518040561 - 2¹⁵ = 4173518007793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4173518040361) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 18272776 + ... + 18499766.

Almost surely, 2^{4173518040561} is an apocalyptic number.

4173518040561 is the 2042919-th square number.

4173518040561 is the 1021460-th centered octagonal number.

It is an amenable number.

4173518040561 is a deficient number, since it is larger than the sum of its proper divisors (2061024029272).

4173518040561 is an frugal number, since it uses more digits than its factorization.

4173518040561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453994 (or 226994 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 4173518040561 in words is "four trillion, one hundred seventy-three billion, five hundred eighteen million, forty thousand, five hundred sixty-one".