25599510442 has 12 divisors (see below), whose sum is σ = 42207457698. Its totient is φ = 11636141000.

The previous prime is 25599510437. The next prime is 25599510467. The reversal of 25599510442 is 24401599552.

It can be written as a sum of positive squares in only one way, i.e., 22475706561 + 3123803881 = 149919^2 + 55891^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25599510392 and 25599510401.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52891309 + ... + 52891792.

Almost surely, 2^25599510442 is an apocalyptic number.

25599510442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25599510442 is a deficient number, since it is larger than the sum of its proper divisors (16607947256).

25599510442 is a wasteful number, since it uses less digits than its factorization.

25599510442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105783125 (or 105783114 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 25599510442 in words is "twenty-five billion, five hundred ninety-nine million, five hundred ten thousand, four hundred forty-two".