25444122134 has 4 divisors (see below), whose sum is σ = 38166183204. Its totient is φ = 12722061066.

The previous prime is 25444122133. The next prime is 25444122169. The reversal of 25444122134 is 43122144452.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25444122134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25444122131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6361030532 + ... + 6361030535.

It is an arithmetic number, because the mean of its divisors is an integer number (9541545801).

Almost surely, 2^25444122134 is an apocalyptic number.

25444122134 is a deficient number, since it is larger than the sum of its proper divisors (12722061070).

25444122134 is a wasteful number, since it uses less digits than its factorization.

25444122134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12722061069.

The product of its digits is 30720, while the sum is 32.

Adding to 25444122134 its reverse (43122144452), we get a palindrome (68566266586).

The spelling of 25444122134 in words is "twenty-five billion, four hundred forty-four million, one hundred twenty-two thousand, one hundred thirty-four".