5217417219661 has 4 divisors (see below), whose sum is σ = 5397328158300. Its totient is φ = 5037506281024.

The previous prime is 5217417219653. The next prime is 5217417219673. The reversal of 5217417219661 is 1669127147125.

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 1099740229225 + 4117676990436 = 1048685^2 + 2029206^2 .

It is a cyclic number.

It is not a de Polignac number, because 5217417219661 - 2³ = 5217417219653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5217417219599 and 5217417219608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5217417219461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89955469276 + ... + 89955469333.

It is an arithmetic number, because the mean of its divisors is an integer number (1349332039575).

Almost surely, 2^{5217417219661} is an apocalyptic number.

It is an amenable number.

5217417219661 is a deficient number, since it is larger than the sum of its proper divisors (179910938639).

5217417219661 is a wasteful number, since it uses less digits than its factorization.

5217417219661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179910938638.

The product of its digits is 1270080, while the sum is 52.

The spelling of 5217417219661 in words is "five trillion, two hundred seventeen billion, four hundred seventeen million, two hundred nineteen thousand, six hundred sixty-one".