5465161521661 has 8 divisors (see below), whose sum is σ = 5664362801240. Its totient is φ = 5268670463808.

The previous prime is 5465161521647. The next prime is 5465161521683. The reversal of 5465161521661 is 1661251615645.

It can be written as a sum of positive squares in 4 ways, for example, as 807830654436 + 4657330867225 = 898794^2 + 2158085^2 .

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 5465161521661 - 2³³ = 5456571587069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5465161521161) 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, 677551326 + ... + 677559391.

It is an arithmetic number, because the mean of its divisors is an integer number (708045350155).

Almost surely, 2^{5465161521661} is an apocalyptic number.

It is an amenable number.

5465161521661 is a deficient number, since it is larger than the sum of its proper divisors (199201279579).

5465161521661 is a wasteful number, since it uses less digits than its factorization.

5465161521661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355110863.

The product of its digits is 1296000, while the sum is 49.

The spelling of 5465161521661 in words is "five trillion, four hundred sixty-five billion, one hundred sixty-one million, five hundred twenty-one thousand, six hundred sixty-one".