25431366442542 has 8 divisors (see below), whose sum is σ = 50862732885096. Its totient is φ = 8477122147512.

The previous prime is 25431366442519. The next prime is 25431366442583. The reversal of 25431366442542 is 24524466313452.

It is a sphenic number, since it is the product of 3 distinct primes.

25431366442542 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2119280536873 + ... + 2119280536884.

It is an arithmetic number, because the mean of its divisors is an integer number (6357841610637).

Almost surely, 2^{25431366442542} is an apocalyptic number.

25431366442542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25431366442542 is a wasteful number, since it uses less digits than its factorization.

25431366442542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238561073762.

The product of its digits is 16588800, while the sum is 51.

The spelling of 25431366442542 in words is "twenty-five trillion, four hundred thirty-one billion, three hundred sixty-six million, four hundred forty-two thousand, five hundred forty-two".