225616072709 has 16 divisors (see below), whose sum is σ = 229436774448. Its totient is φ = 221816143872.

The previous prime is 225616072697. The next prime is 225616072711. The reversal of 225616072709 is 907270616522.

It can be written as a sum of positive squares in 8 ways, for example, as 38578852225 + 187037220484 = 196415^2 + 432478^2 .

It is a cyclic number.

It is not a de Polignac number, because 225616072709 - 2⁸ = 225616072453 is a prime.

It is a super-2 number, since 2×225616072709² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225616072309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40597559 + ... + 40603115.

It is an arithmetic number, because the mean of its divisors is an integer number (14339798403).

Almost surely, 2^225616072709 is an apocalyptic number.

It is an amenable number.

225616072709 is a deficient number, since it is larger than the sum of its proper divisors (3820701739).

225616072709 is a wasteful number, since it uses less digits than its factorization.

225616072709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7304.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 225616072709 in words is "two hundred twenty-five billion, six hundred sixteen million, seventy-two thousand, seven hundred nine".