551644414161 has 16 divisors (see below), whose sum is σ = 737510816448. Its totient is φ = 366771744000.

The previous prime is 551644414151. The next prime is 551644414163. The reversal of 551644414161 is 161414446155.

It is a happy number.

It is not a de Polignac number, because 551644414161 - 2⁷ = 551644414033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551644414163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1593165 + ... + 1908261.

It is an arithmetic number, because the mean of its divisors is an integer number (46094426028).

Almost surely, 2^551644414161 is an apocalyptic number.

It is an amenable number.

551644414161 is a deficient number, since it is larger than the sum of its proper divisors (185866402287).

551644414161 is a wasteful number, since it uses less digits than its factorization.

551644414161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316672.

The product of its digits is 230400, while the sum is 42.

The spelling of 551644414161 in words is "five hundred fifty-one billion, six hundred forty-four million, four hundred fourteen thousand, one hundred sixty-one".