626521216 has 16 divisors (see below), whose sum is σ = 1248147990. Its totient is φ = 313260544.

The previous prime is 626521211. The next prime is 626521261. The reversal of 626521216 is 612125626.

It can be written as a sum of positive squares in only one way, i.e., 561879616 + 64641600 = 23704^2 + 8040^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (626521211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2447221 + ... + 2447476.

Almost surely, 2^626521216 is an apocalyptic number.

It is an amenable number.

626521216 is a deficient number, since it is larger than the sum of its proper divisors (621626774).

626521216 is an equidigital number, since it uses as much as digits as its factorization.

626521216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4894711 (or 4894699 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 626521216 is about 25030.4058297104. The cubic root of 626521216 is about 855.6810760559.

The spelling of 626521216 in words is "six hundred twenty-six million, five hundred twenty-one thousand, two hundred sixteen".