25512042042 has 40 divisors (see below), whose sum is σ = 57254462496. Its totient is φ = 8490835368.

The previous prime is 25512042041. The next prime is 25512042047. The reversal of 25512042042 is 24024021552.

25512042042 is a `hidden beast` number, since 255 + 1 + 204 + 204 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 25512041997 and 25512042015.

It is not an unprimeable number, because it can be changed into a prime (25512042041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16888 + ... + 226515.

Almost surely, 2^25512042042 is an apocalyptic number.

25512042042 is an abundant number, since it is smaller than the sum of its proper divisors (31742420454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25512042042 is a wasteful number, since it uses less digits than its factorization.

25512042042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244064 (or 244055 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 25512042042 its reverse (24024021552), we get a palindrome (49536063594).

The spelling of 25512042042 in words is "twenty-five billion, five hundred twelve million, forty-two thousand, forty-two".