25431354642012 has 48 divisors (see below), whose sum is σ = 64968055404672. Its totient is φ = 7678649897280.

The previous prime is 25431354642007. The next prime is 25431354642019. The reversal of 25431354642012 is 21024645313452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25431354642019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 347728378 + ... + 347801505.

It is an arithmetic number, because the mean of its divisors is an integer number (1353501154264).

Almost surely, 2^{25431354642012} is an apocalyptic number.

25431354642012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25431354642012 is an abundant number, since it is smaller than the sum of its proper divisors (39536700762660).

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

25431354642012 is a wasteful number, since it uses less digits than its factorization.

25431354642012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695530178 (or 695530176 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

Adding to 25431354642012 its reverse (21024645313452), we get a palindrome (46455999955464).

The spelling of 25431354642012 in words is "twenty-five trillion, four hundred thirty-one billion, three hundred fifty-four million, six hundred forty-two thousand, twelve".