626648631 has 8 divisors (see below), whose sum is σ = 954893184. Its totient is φ = 358084920.

The previous prime is 626648609. The next prime is 626648657. The reversal of 626648631 is 136846626.

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

It is not a de Polignac number, because 626648631 - 2⁶ = 626648567 is a prime.

It is a super-2 number, since 2×626648631² = 785377013468348322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626648431) 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, 14920185 + ... + 14920226.

It is an arithmetic number, because the mean of its divisors is an integer number (119361648).

Almost surely, 2^626648631 is an apocalyptic number.

626648631 is a deficient number, since it is larger than the sum of its proper divisors (328244553).

626648631 is a wasteful number, since it uses less digits than its factorization.

626648631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29840421.

The product of its digits is 248832, while the sum is 42.

The square root of 626648631 is about 25032.9509047575. The cubic root of 626648631 is about 855.7390784622.

The spelling of 626648631 in words is "six hundred twenty-six million, six hundred forty-eight thousand, six hundred thirty-one".