25665416730 has 128 divisors (see below), whose sum is σ = 71214163200. Its totient is φ = 6569563392.

The previous prime is 25665416729. The next prime is 25665416773. The reversal of 25665416730 is 3761456652.

25665416730 is a `hidden beast` number, since 2 + 566 + 5 + 4 + 16 + 73 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1345117 + ... + 1364063.

It is an arithmetic number, because the mean of its divisors is an integer number (556360650).

Almost surely, 2^25665416730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25665416730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35607081600).

25665416730 is an abundant number, since it is smaller than the sum of its proper divisors (45548746470).

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

25665416730 is a wasteful number, since it uses less digits than its factorization.

25665416730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19165 (or 19159 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 25665416730 in words is "twenty-five billion, six hundred sixty-five million, four hundred sixteen thousand, seven hundred thirty".