626648881 has 8 divisors (see below), whose sum is σ = 629757504. Its totient is φ = 623547120.

The previous prime is 626648857. The next prime is 626648927. The reversal of 626648881 is 188846626.

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 626648881 - 2⁷ = 626648753 is a prime.

It is a super-2 number, since 2×626648881² = 785377640117104322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (626648821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299220 + ... + 301306.

It is an arithmetic number, because the mean of its divisors is an integer number (78719688).

Almost surely, 2^626648881 is an apocalyptic number.

It is an amenable number.

626648881 is a deficient number, since it is larger than the sum of its proper divisors (3108623).

626648881 is a wasteful number, since it uses less digits than its factorization.

626648881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3431.

The product of its digits is 884736, while the sum is 49.

The square root of 626648881 is about 25032.9558981755. The cubic root of 626648881 is about 855.7391922605.

The spelling of 626648881 in words is "six hundred twenty-six million, six hundred forty-eight thousand, eight hundred eighty-one".