65815855827 has 32 divisors (see below), whose sum is σ = 96983101440. Its totient is φ = 39489838080.

The previous prime is 65815855789. The next prime is 65815855849. The reversal of 65815855827 is 72855851856.

It is not a de Polignac number, because 65815855827 - 2⁸ = 65815855571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65815855727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6787999 + ... + 6797687.

It is an arithmetic number, because the mean of its divisors is an integer number (3030721920).

Almost surely, 2^65815855827 is an apocalyptic number.

65815855827 is a deficient number, since it is larger than the sum of its proper divisors (31167245613).

65815855827 is a wasteful number, since it uses less digits than its factorization.

65815855827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15523.

The product of its digits is 26880000, while the sum is 60.

The spelling of 65815855827 in words is "sixty-five billion, eight hundred fifteen million, eight hundred fifty-five thousand, eight hundred twenty-seven".