650551155161 has 4 divisors (see below), whose sum is σ = 668133618852. Its totient is φ = 632968691472.

The previous prime is 650551155131. The next prime is 650551155169. The reversal of 650551155161 is 161551155056.

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 461134706761 + 189416448400 = 679069^2 + 435220^2 .

It is a cyclic number.

It is not a de Polignac number, because 650551155161 - 2⁶ = 650551155097 is a prime.

It is a super-2 number, since 2×650551155161² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650551155169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8791231790 + ... + 8791231863.

It is an arithmetic number, because the mean of its divisors is an integer number (167033404713).

Almost surely, 2^650551155161 is an apocalyptic number.

It is an amenable number.

650551155161 is a deficient number, since it is larger than the sum of its proper divisors (17582463691).

650551155161 is a wasteful number, since it uses less digits than its factorization.

650551155161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17582463690.

The product of its (nonzero) digits is 112500, while the sum is 41.

The spelling of 650551155161 in words is "six hundred fifty billion, five hundred fifty-one million, one hundred fifty-five thousand, one hundred sixty-one".