645053165613465 has 64 divisors (see below), whose sum is σ = 1251084002826240. Its totient is φ = 277228841310720.

The previous prime is 645053165613433. The next prime is 645053165613499. The reversal of 645053165613465 is 564316561350546.

It is not a de Polignac number, because 645053165613465 - 2⁵ = 645053165613433 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 645053165613399 and 645053165613408.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1233841404 + ... + 1234364093.

It is an arithmetic number, because the mean of its divisors is an integer number (19548187544160).

Almost surely, 2^{645053165613465} is an apocalyptic number.

It is an amenable number.

645053165613465 is a deficient number, since it is larger than the sum of its proper divisors (606030837212775).

645053165613465 is a wasteful number, since it uses less digits than its factorization.

645053165613465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468205662.

The product of its (nonzero) digits is 116640000, while the sum is 60.

The spelling of 645053165613465 in words is "six hundred forty-five trillion, fifty-three billion, one hundred sixty-five million, six hundred thirteen thousand, four hundred sixty-five".