25434144142 has 64 divisors (see below), whose sum is σ = 46112799744. Its totient is φ = 10378621440.

The previous prime is 25434144101. The next prime is 25434144149. The reversal of 25434144142 is 24144143452.

It is a super-3 number, since 3×25434144142³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 25434144098 and 25434144107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25434144149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3204583 + ... + 3212509.

It is an arithmetic number, because the mean of its divisors is an integer number (720512496).

Almost surely, 2^25434144142 is an apocalyptic number.

25434144142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25434144142 is a deficient number, since it is larger than the sum of its proper divisors (20678655602).

25434144142 is a wasteful number, since it uses less digits than its factorization.

25434144142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8353.

The product of its digits is 61440, while the sum is 34.

Adding to 25434144142 its reverse (24144143452), we get a palindrome (49578287594).

The spelling of 25434144142 in words is "twenty-five billion, four hundred thirty-four million, one hundred forty-four thousand, one hundred forty-two".