25635511242 has 24 divisors (see below), whose sum is σ = 60593027040. Its totient is φ = 7768336680.

The previous prime is 25635511241. The next prime is 25635511259. The reversal of 25635511242 is 24211553652.

25635511242 is a `hidden beast` number, since 2 + 5 + 63 + 551 + 1 + 2 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 25635511197 and 25635511206.

It is not an unprimeable number, because it can be changed into a prime (25635511241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64735942 + ... + 64736337.

It is an arithmetic number, because the mean of its divisors is an integer number (2524709460).

Almost surely, 2^25635511242 is an apocalyptic number.

25635511242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25635511242 is an abundant number, since it is smaller than the sum of its proper divisors (34957515798).

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

25635511242 is a wasteful number, since it uses less digits than its factorization.

25635511242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129472298 (or 129472295 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The spelling of 25635511242 in words is "twenty-five billion, six hundred thirty-five million, five hundred eleven thousand, two hundred forty-two".