8146781745 has 16 divisors (see below), whose sum is σ = 13038302592. Its totient is φ = 4343799680.

The previous prime is 8146781743. The next prime is 8146781771. The reversal of 8146781745 is 5471876418.

It is not a de Polignac number, because 8146781745 - 2¹ = 8146781743 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8146781743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11757 + ... + 128186.

It is an arithmetic number, because the mean of its divisors is an integer number (814893912).

Almost surely, 2^8146781745 is an apocalyptic number.

It is an amenable number.

8146781745 is a deficient number, since it is larger than the sum of its proper divisors (4891520847).

8146781745 is a wasteful number, since it uses less digits than its factorization.

8146781745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143832.

The product of its digits is 1505280, while the sum is 51.

The square root of 8146781745 is about 90259.5244004753. The cubic root of 8146781745 is about 2012.1577568038.

The spelling of 8146781745 in words is "eight billion, one hundred forty-six million, seven hundred eighty-one thousand, seven hundred forty-five".