65312543655 has 24 divisors (see below), whose sum is σ = 113249745648. Its totient is φ = 34820637696.

The previous prime is 65312543641. The next prime is 65312543687. The reversal of 65312543655 is 55634521356.

65312543655 is a `hidden beast` number, since 6 + 5 + 31 + 254 + 365 + 5 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-65312543655 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 65312543655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139717 + ... + 387486.

It is an arithmetic number, because the mean of its divisors is an integer number (4718739402).

Almost surely, 2^65312543655 is an apocalyptic number.

65312543655 is a deficient number, since it is larger than the sum of its proper divisors (47937201993).

65312543655 is a wasteful number, since it uses less digits than its factorization.

65312543655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529967 (or 529964 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 45.

The spelling of 65312543655 in words is "sixty-five billion, three hundred twelve million, five hundred forty-three thousand, six hundred fifty-five".