25194040416 has 240 divisors, whose sum is σ = 76300741440. Its totient is φ = 8151736320.

The previous prime is 25194040397. The next prime is 25194040429. The reversal of 25194040416 is 61404049152.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12489840 + ... + 12491856.

It is an arithmetic number, because the mean of its divisors is an integer number (317919756).

Almost surely, 2^25194040416 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 25194040416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38150370720).

25194040416 is an abundant number, since it is smaller than the sum of its proper divisors (51106701024).

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

25194040416 is a wasteful number, since it uses less digits than its factorization.

25194040416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179 (or 2162 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 25194040416 its reverse (61404049152), we get a palindrome (86598089568).

The spelling of 25194040416 in words is "twenty-five billion, one hundred ninety-four million, forty thousand, four hundred sixteen".