1645517265115 has 16 divisors (see below), whose sum is σ = 1996987357440. Its totient is φ = 1301505384960.

The previous prime is 1645517265113. The next prime is 1645517265143. The reversal of 1645517265115 is 5115627155461.

It is not a de Polignac number, because 1645517265115 - 2¹ = 1645517265113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1645517265113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4955350 + ... + 5276980.

It is an arithmetic number, because the mean of its divisors is an integer number (124811709840).

Almost surely, 2^{1645517265115} is an apocalyptic number.

1645517265115 is a deficient number, since it is larger than the sum of its proper divisors (351470092325).

1645517265115 is a wasteful number, since it uses less digits than its factorization.

1645517265115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333222.

The product of its digits is 1260000, while the sum is 49.

The spelling of 1645517265115 in words is "one trillion, six hundred forty-five billion, five hundred seventeen million, two hundred sixty-five thousand, one hundred fifteen".