65855861903 has 4 divisors (see below), whose sum is σ = 70921697448. Its totient is φ = 60790026360.

The previous prime is 65855861899. The next prime is 65855861917. The reversal of 65855861903 is 30916855856.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65855861903 - 2² = 65855861899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65855861923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2532917753 + ... + 2532917778.

It is an arithmetic number, because the mean of its divisors is an integer number (17730424362).

Almost surely, 2^65855861903 is an apocalyptic number.

65855861903 is a deficient number, since it is larger than the sum of its proper divisors (5065835545).

65855861903 is a wasteful number, since it uses less digits than its factorization.

65855861903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5065835544.

The product of its (nonzero) digits is 7776000, while the sum is 56.

The spelling of 65855861903 in words is "sixty-five billion, eight hundred fifty-five million, eight hundred sixty-one thousand, nine hundred three".