25540778624871 has 8 divisors (see below), whose sum is σ = 34372636654464. Its totient is φ = 16868053172600.

The previous prime is 25540778624813. The next prime is 25540778624891. The reversal of 25540778624871 is 17842687704552.

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

It is a cyclic number.

It is not a de Polignac number, because 25540778624871 - 2⁹ = 25540778624359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25540778624891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39783143955 + ... + 39783144596.

It is an arithmetic number, because the mean of its divisors is an integer number (4296579581808).

Almost surely, 2^{25540778624871} is an apocalyptic number.

25540778624871 is a deficient number, since it is larger than the sum of its proper divisors (8831858029593).

25540778624871 is a wasteful number, since it uses less digits than its factorization.

25540778624871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79566288661.

The product of its (nonzero) digits is 210739200, while the sum is 66.

The spelling of 25540778624871 in words is "twenty-five trillion, five hundred forty billion, seven hundred seventy-eight million, six hundred twenty-four thousand, eight hundred seventy-one".