25513466242 has 16 divisors (see below), whose sum is σ = 43188940800. Its totient is φ = 11197132240.

The previous prime is 25513466239. The next prime is 25513466269. The reversal of 25513466242 is 24266431552.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25513466195 and 25513466204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19994242 + ... + 19995517.

It is an arithmetic number, because the mean of its divisors is an integer number (2699308800).

Almost surely, 2^25513466242 is an apocalyptic number.

25513466242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25513466242 is a deficient number, since it is larger than the sum of its proper divisors (17675474558).

25513466242 is a wasteful number, since it uses less digits than its factorization.

25513466242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39989801.

The product of its digits is 345600, while the sum is 40.

Adding to 25513466242 its reverse (24266431552), we get a palindrome (49779897794).

The spelling of 25513466242 in words is "twenty-five billion, five hundred thirteen million, four hundred sixty-six thousand, two hundred forty-two".