561151669 has 8 divisors (see below), whose sum is σ = 605669400. Its totient is φ = 516827136.

The previous prime is 561151639. The next prime is 561151673. The reversal of 561151669 is 966151165.

It can be written as a sum of positive squares in 4 ways, for example, as 105329169 + 455822500 = 10263^2 + 21350^2 .

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 561151669 - 2¹¹ = 561149621 is a prime.

It is a super-2 number, since 2×561151669² = 629782391242971122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561151639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42232 + ... + 53905.

It is an arithmetic number, because the mean of its divisors is an integer number (75708675).

Almost surely, 2^561151669 is an apocalyptic number.

It is an amenable number.

561151669 is a deficient number, since it is larger than the sum of its proper divisors (44517731).

561151669 is a wasteful number, since it uses less digits than its factorization.

561151669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96599.

The product of its digits is 48600, while the sum is 40.

The square root of 561151669 is about 23688.6400833817. The cubic root of 561151669 is about 824.8217155002.

The spelling of 561151669 in words is "five hundred sixty-one million, one hundred fifty-one thousand, six hundred sixty-nine".