25135440446 has 16 divisors (see below), whose sum is σ = 38355717888. Its totient is φ = 12351427200.

The previous prime is 25135440437. The next prime is 25135440469. The reversal of 25135440446 is 64404453152.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265310 + ... + 347361.

It is an arithmetic number, because the mean of its divisors is an integer number (2397232368).

Almost surely, 2^25135440446 is an apocalyptic number.

25135440446 is a deficient number, since it is larger than the sum of its proper divisors (13220277442).

25135440446 is a wasteful number, since it uses less digits than its factorization.

25135440446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613027.

The product of its (nonzero) digits is 230400, while the sum is 38.

Adding to 25135440446 its reverse (64404453152), we get a palindrome (89539893598).

The spelling of 25135440446 in words is "twenty-five billion, one hundred thirty-five million, four hundred forty thousand, four hundred forty-six".