65217007200155 has 4 divisors (see below), whose sum is σ = 78260408640192. Its totient is φ = 52173605760120.

The previous prime is 65217007200139. The next prime is 65217007200199. The reversal of 65217007200155 is 55100270071256.

It is a happy number.

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

It is not a de Polignac number, because 65217007200155 - 2⁴ = 65217007200139 is a prime.

It is a super-2 number, since 2×65217007200155² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6521700720011 + ... + 6521700720020.

It is an arithmetic number, because the mean of its divisors is an integer number (19565102160048).

Almost surely, 2^{65217007200155} is an apocalyptic number.

65217007200155 is a deficient number, since it is larger than the sum of its proper divisors (13043401440037).

65217007200155 is a wasteful number, since it uses less digits than its factorization.

65217007200155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13043401440036.

The product of its (nonzero) digits is 147000, while the sum is 41.

The spelling of 65217007200155 in words is "sixty-five trillion, two hundred seventeen billion, seven million, two hundred thousand, one hundred fifty-five".