25540013204 has 6 divisors (see below), whose sum is σ = 44695023114. Its totient is φ = 12770006600.

The previous prime is 25540013153. The next prime is 25540013207. The reversal of 25540013204 is 40231004552.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23241002500 + 2299010704 = 152450^2 + 47948^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25540013207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3192501647 + ... + 3192501654.

It is an arithmetic number, because the mean of its divisors is an integer number (7449170519).

Almost surely, 2^25540013204 is an apocalyptic number.

It is an amenable number.

25540013204 is a deficient number, since it is larger than the sum of its proper divisors (19155009910).

25540013204 is a wasteful number, since it uses less digits than its factorization.

25540013204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6385003305 (or 6385003303 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 25540013204 its reverse (40231004552), we get a palindrome (65771017756).

The spelling of 25540013204 in words is "twenty-five billion, five hundred forty million, thirteen thousand, two hundred four".