25816728532887 has 24 divisors (see below), whose sum is σ = 38365867388784. Its totient is φ = 16722019188864.

The previous prime is 25816728532883. The next prime is 25816728532897. The reversal of 25816728532887 is 78823582761852.

25816728532887 is a `hidden beast` number, since 2 + 5 + 8 + 1 + 6 + 7 + 2 + 8 + 532 + 8 + 87 = 666.

It is not a de Polignac number, because 25816728532887 - 2² = 25816728532883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25816728532883) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 293201268 + ... + 293289305.

It is an arithmetic number, because the mean of its divisors is an integer number (1598577807866).

Almost surely, 2^{25816728532887} is an apocalyptic number.

25816728532887 is a deficient number, since it is larger than the sum of its proper divisors (12549138855897).

25816728532887 is a wasteful number, since it uses less digits than its factorization.

25816728532887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586490719 (or 586490716 counting only the distinct ones).

The product of its digits is 722534400, while the sum is 72.

The spelling of 25816728532887 in words is "twenty-five trillion, eight hundred sixteen billion, seven hundred twenty-eight million, five hundred thirty-two thousand, eight hundred eighty-seven".