25551361242 has 48 divisors (see below), whose sum is σ = 60513017760. Its totient is φ = 7727594400.

The previous prime is 25551361219. The next prime is 25551361259. The reversal of 25551361242 is 24216315552.

25551361242 is a `hidden beast` number, since 2 + 5 + 5 + 51 + 361 + 242 = 666.

It is a super-2 number, since 2×25551361242² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25551361197 and 25551361206.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25984 + ... + 227547.

It is an arithmetic number, because the mean of its divisors is an integer number (1260687870).

Almost surely, 2^25551361242 is an apocalyptic number.

25551361242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25551361242 is an abundant number, since it is smaller than the sum of its proper divisors (34961656518).

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

25551361242 is a wasteful number, since it uses less digits than its factorization.

25551361242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254059 (or 254056 counting only the distinct ones).

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

Adding to 25551361242 its reverse (24216315552), we get a palindrome (49767676794).

The spelling of 25551361242 in words is "twenty-five billion, five hundred fifty-one million, three hundred sixty-one thousand, two hundred forty-two".