626690561 has 8 divisors (see below), whose sum is σ = 716370624. Its totient is φ = 537048720.

The previous prime is 626690543. The next prime is 626690569. The reversal of 626690561 is 165096626.

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 626690561 - 2¹⁰ = 626689537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (626690569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52271 + ... + 63131.

It is an arithmetic number, because the mean of its divisors is an integer number (89546328).

Almost surely, 2^626690561 is an apocalyptic number.

It is an amenable number.

626690561 is a deficient number, since it is larger than the sum of its proper divisors (89680063).

626690561 is a wasteful number, since it uses less digits than its factorization.

626690561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19111.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 626690561 is about 25033.7883868982. The cubic root of 626690561 is about 855.7581642983.

The spelling of 626690561 in words is "six hundred twenty-six million, six hundred ninety thousand, five hundred sixty-one".