64651665017275 has 48 divisors (see below), whose sum is σ = 95520252098304. Its totient is φ = 42484569079680.

The previous prime is 64651665017221. The next prime is 64651665017281. The reversal of 64651665017275 is 57271056615646.

It is not a de Polignac number, because 64651665017275 - 2³³ = 64643075082683 is a prime.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80653849 + ... + 81451498.

It is an arithmetic number, because the mean of its divisors is an integer number (1990005252048).

Almost surely, 2^{64651665017275} is an apocalyptic number.

64651665017275 is a deficient number, since it is larger than the sum of its proper divisors (30868587081029).

64651665017275 is a wasteful number, since it uses less digits than its factorization.

64651665017275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162105460 (or 162105455 counting only the distinct ones).

The product of its (nonzero) digits is 63504000, while the sum is 61.

The spelling of 64651665017275 in words is "sixty-four trillion, six hundred fifty-one billion, six hundred sixty-five million, seventeen thousand, two hundred seventy-five".