25216169616 has 225 divisors, whose sum is σ = 80421436249. Its totient is φ = 7622208000.

The previous prime is 25216169431. The next prime is 25216169633. The reversal of 25216169616 is 61696161252.

The square root of 25216169616 is 158796.

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

25216169616 is a `hidden beast` number, since 2 + 5 + 2 + 16 + 16 + 9 + 616 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24965264016 + 250905600 = 158004^2 + 15840^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 62883016 + ... + 62883416.

Almost surely, 2^25216169616 is an apocalyptic number.

25216169616 is the 158796-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25216169616

25216169616 is an abundant number, since it is smaller than the sum of its proper divisors (55205266633).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25216169616 is an equidigital number, since it uses as much as digits as its factorization.

25216169616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 417 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The spelling of 25216169616 in words is "twenty-five billion, two hundred sixteen million, one hundred sixty-nine thousand, six hundred sixteen".