25405240310242 has 32 divisors (see below), whose sum is σ = 41260381928640. Its totient is φ = 11662463695680.

The previous prime is 25405240310201. The next prime is 25405240310279. The reversal of 25405240310242 is 24201304250452.

It is a super-2 number, since 2×25405240310242² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25405240310198 and 25405240310207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 789609 + ... + 7171747.

It is an arithmetic number, because the mean of its divisors is an integer number (1289386935270).

Almost surely, 2^{25405240310242} is an apocalyptic number.

25405240310242 is a deficient number, since it is larger than the sum of its proper divisors (15855141618398).

25405240310242 is a wasteful number, since it uses less digits than its factorization.

25405240310242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6382978.

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 25405240310242 its reverse (24201304250452), we get a palindrome (49606544560694).

The spelling of 25405240310242 in words is "twenty-five trillion, four hundred five billion, two hundred forty million, three hundred ten thousand, two hundred forty-two".