16619077225 has 81 divisors (see below), whose sum is σ = 23127981303. Its totient is φ = 11843678880.

The previous prime is 16619077201. The next prime is 16619077231. The reversal of 16619077225 is 52277091661.

The square root of 16619077225 is 128915.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5982867801 + 10636209424 = 77349^2 + 103132^2 .

It is not a de Polignac number, because 16619077225 - 2¹⁵ = 16619044457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 281679246 + ... + 281679304.

Almost surely, 2^16619077225 is an apocalyptic number.

16619077225 is the 128915-th square number.

16619077225 is the 64458-th centered octagonal number.

It is an amenable number.

16619077225 is a deficient number, since it is larger than the sum of its proper divisors (6508904078).

16619077225 is an equidigital number, since it uses as much as digits as its factorization.

16619077225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 16619077225 in words is "sixteen billion, six hundred nineteen million, seventy-seven thousand, two hundred twenty-five".