25431366442541 has 4 divisors (see below), whose sum is σ = 25431380619072. Its totient is φ = 25431352266012.

The previous prime is 25431366442519. The next prime is 25431366442583. The reversal of 25431366442541 is 14524466313452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25431366442541 - 2²⁶ = 25431299333677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25431366442541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25431366441541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3927635 + ... + 8141808.

It is an arithmetic number, because the mean of its divisors is an integer number (6357845154768).

Almost surely, 2^{25431366442541} is an apocalyptic number.

It is an amenable number.

25431366442541 is a deficient number, since it is larger than the sum of its proper divisors (14176531).

25431366442541 is a wasteful number, since it uses less digits than its factorization.

25431366442541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14176530.

The product of its digits is 8294400, while the sum is 50.

The spelling of 25431366442541 in words is "twenty-five trillion, four hundred thirty-one billion, three hundred sixty-six million, four hundred forty-two thousand, five hundred forty-one".