1164004556865 has 32 divisors (see below), whose sum is σ = 1867229521920. Its totient is φ = 619195625664.

The previous prime is 1164004556849. The next prime is 1164004556867. The reversal of 1164004556865 is 5686554004611.

It is not a de Polignac number, because 1164004556865 - 2⁴ = 1164004556849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1164004556867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36858312 + ... + 36889878.

It is an arithmetic number, because the mean of its divisors is an integer number (58350922560).

Almost surely, 2^{1164004556865} is an apocalyptic number.

1164004556865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1164004556865 is a deficient number, since it is larger than the sum of its proper divisors (703224965055).

1164004556865 is a wasteful number, since it uses less digits than its factorization.

1164004556865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37861.

The product of its (nonzero) digits is 3456000, while the sum is 51.

The spelling of 1164004556865 in words is "one trillion, one hundred sixty-four billion, four million, five hundred fifty-six thousand, eight hundred sixty-five".