25510442042 has 48 divisors (see below), whose sum is σ = 41041855008. Its totient is φ = 11884968480.

The previous prime is 25510442039. The next prime is 25510442047. The reversal of 25510442042 is 24024401552.

It is a super-2 number, since 2×25510442042² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25510441996 and 25510442014.

It is not an unprimeable number, because it can be changed into a prime (25510442047) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 31071992 + ... + 31072812.

It is an arithmetic number, because the mean of its divisors is an integer number (855038646).

Almost surely, 2^25510442042 is an apocalyptic number.

25510442042 is a deficient number, since it is larger than the sum of its proper divisors (15531412966).

25510442042 is a wasteful number, since it uses less digits than its factorization.

25510442042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 25510442042 its reverse (24024401552), we get a palindrome (49534843594).

The spelling of 25510442042 in words is "twenty-five billion, five hundred ten million, four hundred forty-two thousand, forty-two".