8145127761 has 4 divisors (see below), whose sum is σ = 10860170352. Its totient is φ = 5430085172.

The previous prime is 8145127759. The next prime is 8145127769. The reversal of 8145127761 is 1677215418.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8145127761 - 2¹ = 8145127759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8145127769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1357521291 + ... + 1357521296.

It is an arithmetic number, because the mean of its divisors is an integer number (2715042588).

Almost surely, 2^8145127761 is an apocalyptic number.

It is an amenable number.

8145127761 is a deficient number, since it is larger than the sum of its proper divisors (2715042591).

8145127761 is a wasteful number, since it uses less digits than its factorization.

8145127761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715042590.

The product of its digits is 94080, while the sum is 42.

The square root of 8145127761 is about 90250.3615560625. The cubic root of 8145127761 is about 2012.0215761585.

The spelling of 8145127761 in words is "eight billion, one hundred forty-five million, one hundred twenty-seven thousand, seven hundred sixty-one".