1643676260165 has 16 divisors (see below), whose sum is σ = 2006193087360. Its totient is φ = 1292505107520.

The previous prime is 1643676260143. The next prime is 1643676260173. The reversal of 1643676260165 is 5610626763461.

It is a de Polignac number, because none of the positive numbers 2^k-1643676260165 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5167145 + ... + 5476014.

It is an arithmetic number, because the mean of its divisors is an integer number (125387067960).

Almost surely, 2^{1643676260165} is an apocalyptic number.

It is an amenable number.

1643676260165 is a deficient number, since it is larger than the sum of its proper divisors (362516827195).

1643676260165 is a wasteful number, since it uses less digits than its factorization.

1643676260165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10643692.

The product of its (nonzero) digits is 6531840, while the sum is 53.

The spelling of 1643676260165 in words is "one trillion, six hundred forty-three billion, six hundred seventy-six million, two hundred sixty thousand, one hundred sixty-five".