16506551241 has 6 divisors (see below), whose sum is σ = 23842796250. Its totient is φ = 11004367488.

The previous prime is 16506551231. The next prime is 16506551263. The reversal of 16506551241 is 14215560561.

16506551241 is a `hidden beast` number, since 1 + 65 + 0 + 6 + 551 + 2 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16498118025 + 8433216 = 128445^2 + 2904^2 .

It is not a de Polignac number, because 16506551241 - 2²¹ = 16504454089 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16506551196 and 16506551205.

It is not an unprimeable number, because it can be changed into a prime (16506551221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 917030616 + ... + 917030633.

It is an arithmetic number, because the mean of its divisors is an integer number (3973799375).

Almost surely, 2^16506551241 is an apocalyptic number.

It is an amenable number.

16506551241 is a deficient number, since it is larger than the sum of its proper divisors (7336245009).

16506551241 is a wasteful number, since it uses less digits than its factorization.

16506551241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834061255 (or 1834061252 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 16506551241 in words is "sixteen billion, five hundred six million, five hundred fifty-one thousand, two hundred forty-one".