551644956145 has 8 divisors (see below), whose sum is σ = 662290845480. Its totient is φ = 441104699520.

The previous prime is 551644956067. The next prime is 551644956173. The reversal of 551644956145 is 541659446155.

It can be written as a sum of positive squares in 4 ways, for example, as 202863763216 + 348781192929 = 450404^2 + 590577^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 551644956145 - 2⁹ = 551644955633 is a prime.

It is a super-2 number, since 2×551644956145² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26396686 + ... + 26417575.

It is an arithmetic number, because the mean of its divisors is an integer number (82786355685).

Almost surely, 2^551644956145 is an apocalyptic number.

It is an amenable number.

551644956145 is a deficient number, since it is larger than the sum of its proper divisors (110645889335).

551644956145 is a wasteful number, since it uses less digits than its factorization.

551644956145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52816355.

The product of its digits is 12960000, while the sum is 55.

The spelling of 551644956145 in words is "five hundred fifty-one billion, six hundred forty-four million, nine hundred fifty-six thousand, one hundred forty-five".