25135135042 has 8 divisors (see below), whose sum is σ = 38341731600. Its totient is φ = 12354557844.

The previous prime is 25135135013. The next prime is 25135135049. The reversal of 25135135042 is 24053153152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25135134995 and 25135135013.

It is not an unprimeable number, because it can be changed into a prime (25135135049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106504692 + ... + 106504927.

It is an arithmetic number, because the mean of its divisors is an integer number (4792716450).

Almost surely, 2^25135135042 is an apocalyptic number.

25135135042 is a deficient number, since it is larger than the sum of its proper divisors (13206596558).

25135135042 is a wasteful number, since it uses less digits than its factorization.

25135135042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213009680.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 25135135042 its reverse (24053153152), we get a palindrome (49188288194).

The spelling of 25135135042 in words is "twenty-five billion, one hundred thirty-five million, one hundred thirty-five thousand, forty-two".