65655857215 has 8 divisors (see below), whose sum is σ = 84847569408. Its totient is φ = 48484325280.

The previous prime is 65655857209. The next prime is 65655857231. The reversal of 65655857215 is 51275855656.

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

It is not a de Polignac number, because 65655857215 - 2¹³ = 65655849023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 505044991 + ... + 505045120.

It is an arithmetic number, because the mean of its divisors is an integer number (10605946176).

Almost surely, 2^65655857215 is an apocalyptic number.

65655857215 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

65655857215 is a deficient number, since it is larger than the sum of its proper divisors (19191712193).

65655857215 is a wasteful number, since it uses less digits than its factorization.

65655857215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010090129.

The product of its digits is 12600000, while the sum is 55.

The spelling of 65655857215 in words is "sixty-five billion, six hundred fifty-five million, eight hundred fifty-seven thousand, two hundred fifteen".