25894967616 has 504 divisors, whose sum is σ = 90339867072. Its totient is φ = 6942412800.

The previous prime is 25894967591. The next prime is 25894967617. The reversal of 25894967616 is 61676949852.

25894967616 is a `hidden beast` number, since 2 + 5 + 8 + 9 + 4 + 9 + 6 + 7 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (504).

It is a Harshad number since it is a multiple of its sum of digits (63).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25894967617) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 158864751 + ... + 158864913.

It is an arithmetic number, because the mean of its divisors is an integer number (179245768).

Almost surely, 2^25894967616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25894967616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45169933536).

25894967616 is an abundant number, since it is smaller than the sum of its proper divisors (64444899456).

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

25894967616 is a wasteful number, since it uses less digits than its factorization.

25894967616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 247 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The spelling of 25894967616 in words is "twenty-five billion, eight hundred ninety-four million, nine hundred sixty-seven thousand, six hundred sixteen".