25521345104 has 10 divisors (see below), whose sum is σ = 49447606170. Its totient is φ = 12760672544.

The previous prime is 25521345103. The next prime is 25521345151. The reversal of 25521345104 is 40154312552.

It can be written as a sum of positive squares in only one way, i.e., 23752974400 + 1768370704 = 154120^2 + 42052^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25521345103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 797542019 + ... + 797542050.

It is an arithmetic number, because the mean of its divisors is an integer number (4944760617).

Almost surely, 2^25521345104 is an apocalyptic number.

It is an amenable number.

25521345104 is a deficient number, since it is larger than the sum of its proper divisors (23926261066).

25521345104 is a wasteful number, since it uses less digits than its factorization.

25521345104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595084077 (or 1595084071 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 25521345104 its reverse (40154312552), we get a palindrome (65675657656).

The spelling of 25521345104 in words is "twenty-five billion, five hundred twenty-one million, three hundred forty-five thousand, one hundred four".