5216446645 has 4 divisors (see below), whose sum is σ = 6259735980. Its totient is φ = 4173157312.

The previous prime is 5216446603. The next prime is 5216446673. The reversal of 5216446645 is 5466446125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1692005956 + 3524440689 = 41134^2 + 59367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5216446645 is a prime.

It is a super-2 number, since 2×5216446645² = 54422631200263512050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521644660 + ... + 521644669.

It is an arithmetic number, because the mean of its divisors is an integer number (1564933995).

Almost surely, 2^5216446645 is an apocalyptic number.

It is an amenable number.

5216446645 is a deficient number, since it is larger than the sum of its proper divisors (1043289335).

5216446645 is a wasteful number, since it uses less digits than its factorization.

5216446645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043289334.

The product of its digits is 691200, while the sum is 43.

The square root of 5216446645 is about 72224.9724472083. The cubic root of 5216446645 is about 1734.3027918946.

The spelling of 5216446645 in words is "five billion, two hundred sixteen million, four hundred forty-six thousand, six hundred forty-five".